Hey guys,
    I am trying to setup a mail server and was getting an error and was
wondering if someone can help me out here. I am using a web server on
my own home network which has a router. I am using Argosoft Mail
Server. When i send an email i get an error saying that Winsock Error
When Communicating with Exchanger. I sent an email to @gmail.com and it
gets 5 MX records for it but then cannot connect and gives this error.
This error has been bothering me for a while now and i just can figure
out what the root of this error is.

I would greatly appreciate it if someone can help me out here.

Thanks a lot!!!.

"believeryes" <azzamqazi@gmail.com> wrote in news:1168485705.455971.192820
@k58g2000hse.googlegroups.com:

> Hey guys,
>     I am trying to setup a mail server and was getting an error and was
> wondering if someone can help me out here. I am using a web server on
> my own home network which has a router. I am using Argosoft Mail
> Server. When i send an email i get an error saying that Winsock Error
> When Communicating with Exchanger. I sent an email to @gmail.com and it
> gets 5 MX records for it but then cannot connect and gives this error.
> This error has been bothering me for a while now and i just can figure
> out what the root of this error is.

Many ISPs block outgoing port 25 (smtp) connections to prevent infected PCs 
from relaying spam. Try using telnet to connect to an external mail server 
like gmail [ 72.14.205.27 ] on port 25. Can you connect and see the 
greeting?

-- 
Jem Berkes
www.sysdesign.ca

nope i cannot connect. so it means that port 25 is blocked. So what are
my options here? Also when i send an email to this email, it does'nt
get delivered but it does'nt get bounced too, so what do you think can
be the reason?

Thanks a lot for your help.


Jem Berkes wrote:
> "believeryes" <azzamqazi@gmail.com> wrote in news:1168485705.455971.192820
> @k58g2000hse.googlegroups.com:
>
> > Hey guys,
> >     I am trying to setup a mail server and was getting an error and was
> > wondering if someone can help me out here. I am using a web server on
> > my own home network which has a router. I am using Argosoft Mail
> > Server. When i send an email i get an error saying that Winsock Error
> > When Communicating with Exchanger. I sent an email to @gmail.com and it
> > gets 5 MX records for it but then cannot connect and gives this error.
> > This error has been bothering me for a while now and i just can figure
> > out what the root of this error is.
>
> Many ISPs block outgoing port 25 (smtp) connections to prevent infected PCs
> from relaying spam. Try using telnet to connect to an external mail server
> like gmail [ 72.14.205.27 ] on port 25. Can you connect and see the
> greeting?
> 
> -- 
> Jem Berkes
> www.sysdesign.ca

"believeryes" <azzamqazi@gmail.com> wrote in news:1168487327.298642.140050
@p59g2000hsd.googlegroups.com:

> nope i cannot connect. so it means that port 25 is blocked. So what are
> my options here? Also when i send an email to this email, it does'nt
> get delivered but it does'nt get bounced too, so what do you think can
> be the reason?

You are probably not seeing a bounce because the connection is timing out. 
The software can't distinguish this error from other temporary problems 
like a host being unreachable. So it probably has queued the mail and will 
retry, though it will never work even after you wait.

First thing would be to contact your ISP, perhaps they can allow you to use 
port 25. However I wouldn't be surprised if they said no, since small mail 
servers are a notoriously bad spam problem.

The next option is to send the mail through your ISP's outgoing SMTP relay. 
Most mail servers can be configured to use a "smarthost" as it's called. 
This will probably work.

-- 
Jem Berkes
www.sysdesign.ca

In article <Xns98B4F0312C95Ejbuserspc9org@216.196.97.131>, Jem Berkes <jb@users.pc9.org> writes:
>"believeryes" <azzamqazi@gmail.com> wrote in news:1168487327.298642.140050
>@p59g2000hsd.googlegroups.com:
>
>> nope i cannot connect. so it means that port 25 is blocked. So what are
>> my options here? Also when i send an email to this email, it does'nt
>> get delivered but it does'nt get bounced too, so what do you think can
>> be the reason?
>
>You are probably not seeing a bounce because the connection is timing out. 
>The software can't distinguish this error from other temporary problems 
>like a host being unreachable. So it probably has queued the mail and will 
>retry, though it will never work even after you wait.
>
>First thing would be to contact your ISP, perhaps they can allow you to use 
>port 25. However I wouldn't be surprised if they said no, since small mail 
>servers are a notoriously bad spam problem.
>
Even if they did allow you to send out via port 25 it may not be a good idea.
Many organisation's mailservers are now using lists such as MAPS DUL, 
SORBS DUHL and SPAMHAUS PBL to reject mail coming directly from dynamic IP
addresses. 

See

http://mail-abuse.com/enduserinfo_dul.html

http://www.de.sorbs.net/faq/dul.shtml

and

http://www.spamhaus.org/pbl/


which means if you send out directly lots of your mail may be rejected by the
recipient's mail servers.


>The next option is to send the mail through your ISP's outgoing SMTP relay. 
>Most mail servers can be configured to use a "smarthost" as it's called. 
>This will probably work.
>
That is probably the best idea.


David Webb
Security team leader
CCSS
Middlesex University


>-- 
>Jem Berkes
>www.sysdesign.ca

david20@alpha1.mdx.ac.uk wrote in news:eo5p9m$f9v$1@south.jnrs.ja.net:

>>First thing would be to contact your ISP, perhaps they can allow you
>>to use port 25. However I wouldn't be surprised if they said no, since
>>small mail servers are a notoriously bad spam problem.
>>
> Even if they did allow you to send out via port 25 it may not be a
> good idea. Many organisation's mailservers are now using lists such as
> MAPS DUL, SORBS DUHL and SPAMHAUS PBL to reject mail coming directly
> from dynamic IP addresses. 

The OP didn't say whether they are on a dynamic IP. Anyway, depending on 
who they are mailing to begin with (other ISPs? or just own contacts) it 
may not matter if their IP address is on lists like those you mention.

-- 
Jem Berkes
www.sysdesign.ca

Thank you so much for the input guys. Well yeah i am using a dynamic ip
address but i am using zoneedit which takes care of it.

Also now i am using the ISP outgoing smtp mail server and the mail is
going fine but i still cannot receive any emails. I have MX records
setup for my mail server and the MX records resolves to the right ip
address but i dont receive any emails. Any ideas on why i cannot
receive them?

Is it because port 25 is blocked? I think incomming emails uses port
110 right? How can i check if port 110 is blocked or not?

Thanks a lot guys and any input will be much appreciated.

Thanks for the all the replies.


Jem Berkes wrote:
> david20@alpha1.mdx.ac.uk wrote in news:eo5p9m$f9v$1@south.jnrs.ja.net:
>
> >>First thing would be to contact your ISP, perhaps they can allow you
> >>to use port 25. However I wouldn't be surprised if they said no, since
> >>small mail servers are a notoriously bad spam problem.
> >>
> > Even if they did allow you to send out via port 25 it may not be a
> > good idea. Many organisation's mailservers are now using lists such as
> > MAPS DUL, SORBS DUHL and SPAMHAUS PBL to reject mail coming directly
> > from dynamic IP addresses.
>
> The OP didn't say whether they are on a dynamic IP. Anyway, depending on
> who they are mailing to begin with (other ISPs? or just own contacts) it
> may not matter if their IP address is on lists like those you mention.
> 
> -- 
> Jem Berkes
> www.sysdesign.ca

"believeryes" <azzamqazi@gmail.com> wrote in news:1168568311.478034.206470
@q2g2000cwa.googlegroups.com:

> Thank you so much for the input guys. Well yeah i am using a dynamic ip
> address but i am using zoneedit which takes care of it.
> 
> Also now i am using the ISP outgoing smtp mail server and the mail is
> going fine but i still cannot receive any emails. I have MX records
> setup for my mail server and the MX records resolves to the right ip
> address but i dont receive any emails. Any ideas on why i cannot
> receive them?
> 
> Is it because port 25 is blocked? I think incomming emails uses port
> 110 right? How can i check if port 110 is blocked or not?

Glad we could help.

For incoming mail, it's still port 25. To test this, try to telnet into 
your IP address on port 25 from a remote host. Should be easy to test.

Other reasons would be to make sure your MX record and all the hostnames 
are accurate and up to date. The problem with a dynamic IP is obviously 
that the IP address changes and you have to update the hostnames. Search 
google for "dns lookup tool" or "nslookup gateway" and see if your MX 
record and the hostname resolve to the correct IP address.

-- 
Jem Berkes
www.sysdesign.ca

Thanks a lot.

Yes i think i port 25 is blocked because i cannot telnet.

The MX record IP address are uptodate, i just double checked it.

Any ideas on how to make this work now that port 25 is blocked?

Thanks a lot!!

Jem Berkes wrote:
> "believeryes" <azzamqazi@gmail.com> wrote in news:1168568311.478034.206470
> @q2g2000cwa.googlegroups.com:
>
> > Thank you so much for the input guys. Well yeah i am using a dynamic ip
> > address but i am using zoneedit which takes care of it.
> >
> > Also now i am using the ISP outgoing smtp mail server and the mail is
> > going fine but i still cannot receive any emails. I have MX records
> > setup for my mail server and the MX records resolves to the right ip
> > address but i dont receive any emails. Any ideas on why i cannot
> > receive them?
> >
> > Is it because port 25 is blocked? I think incomming emails uses port
> > 110 right? How can i check if port 110 is blocked or not?
>
> Glad we could help.
>
> For incoming mail, it's still port 25. To test this, try to telnet into
> your IP address on port 25 from a remote host. Should be easy to test.
>
> Other reasons would be to make sure your MX record and all the hostnames
> are accurate and up to date. The problem with a dynamic IP is obviously
> that the IP address changes and you have to update the hostnames. Search
> google for "dns lookup tool" or "nslookup gateway" and see if your MX
> record and the hostname resolve to the correct IP address.
> 
> -- 
> Jem Berkes
> www.sysdesign.ca

Also i tried connecting to the server from my own home network and it
still cannot connect using the telnet port 25. So it means that the
port 25 is blocked on the router right?

Any ideas on what to do now?


believeryes wrote:
> Thanks a lot.
>
> Yes i think i port 25 is blocked because i cannot telnet.
>
> The MX record IP address are uptodate, i just double checked it.
>
> Any ideas on how to make this work now that port 25 is blocked?
>
> Thanks a lot!!
>
> Jem Berkes wrote:
> > "believeryes" <azzamqazi@gmail.com> wrote in news:1168568311.478034.206470
> > @q2g2000cwa.googlegroups.com:
> >
> > > Thank you so much for the input guys. Well yeah i am using a dynamic ip
> > > address but i am using zoneedit which takes care of it.
> > >
> > > Also now i am using the ISP outgoing smtp mail server and the mail is
> > > going fine but i still cannot receive any emails. I have MX records
> > > setup for my mail server and the MX records resolves to the right ip
> > > address but i dont receive any emails. Any ideas on why i cannot
> > > receive them?
> > >
> > > Is it because port 25 is blocked? I think incomming emails uses port
> > > 110 right? How can i check if port 110 is blocked or not?
> >
> > Glad we could help.
> >
> > For incoming mail, it's still port 25. To test this, try to telnet into
> > your IP address on port 25 from a remote host. Should be easy to test.
> >
> > Other reasons would be to make sure your MX record and all the hostnames
> > are accurate and up to date. The problem with a dynamic IP is obviously
> > that the IP address changes and you have to update the hostnames. Search
> > google for "dns lookup tool" or "nslookup gateway" and see if your MX
> > record and the hostname resolve to the correct IP address.
> > 
> > -- 
> > Jem Berkes
> > www.sysdesign.ca

In article <1168570669.738502.326800@q2g2000cwa.googlegroups.com>, "believeryes" <azzamqazi@gmail.com> writes:
>
>Thanks a lot.
>
>Yes i think i port 25 is blocked because i cannot telnet.
>
>The MX record IP address are uptodate, i just double checked it.
>
>Any ideas on how to make this work now that port 25 is blocked?
>
Some dynamic DNS providers provide services (though usually not for free)
which relay mail for your domain through their servers and then deliver it to
your server over an alternate port. You just need to find a port which your ISP
isn't blocking.

I don't know whether zonedit provides such a service.

DynDNS does see

http://www.dyndns.com/services/mailhop/relay.html


David Webb
Security team leader
CCSS
Middlesex University

PS.

Note the fact that your ISP is blocking incoming connections to port 25 may
indicate they really don't want you to be doing this - you might want to check
their terms and conditions to make sure that they don't explicitly ban you from
running your own mailserver. It would be a pity to set this all up and then
have your ISP disconnect you.


PS 2.

Port 110 is the standard port for POP3 which is one of the standard protocols
for accessing mail from a mailbox (The other standard protocol being IMAP which
uses port 143)
POP basically just downloads mail from your inbox to your local machine whereas
IMAP allows you to read and manipulate the mail on the mail server hosting your
mailbox and gives you access to multiple folders.







>Thanks a lot!!
>
>Jem Berkes wrote:
>> "believeryes" <azzamqazi@gmail.com> wrote in news:1168568311.478034.206470
>> @q2g2000cwa.googlegroups.com:
>>
>> > Thank you so much for the input guys. Well yeah i am using a dynamic ip
>> > address but i am using zoneedit which takes care of it.
>> >
>> > Also now i am using the ISP outgoing smtp mail server and the mail is
>> > going fine but i still cannot receive any emails. I have MX records
>> > setup for my mail server and the MX records resolves to the right ip
>> > address but i dont receive any emails. Any ideas on why i cannot
>> > receive them?
>> >
>> > Is it because port 25 is blocked? I think incomming emails uses port
>> > 110 right? How can i check if port 110 is blocked or not?
>>
>> Glad we could help.
>>
>> For incoming mail, it's still port 25. To test this, try to telnet into
>> your IP address on port 25 from a remote host. Should be easy to test.
>>
>> Other reasons would be to make sure your MX record and all the hostnames
>> are accurate and up to date. The problem with a dynamic IP is obviously
>> that the IP address changes and you have to update the hostnames. Search
>> google for "dns lookup tool" or "nslookup gateway" and see if your MX
>> record and the hostname resolve to the correct IP address.
>> 
>> -- 
>> Jem Berkes
>> www.sysdesign.ca
>

In article <1168570964.684516.143230@v45g2000cwv.googlegroups.com>, "believeryes" <azzamqazi@gmail.com> writes:
>Also i tried connecting to the server from my own home network and it
>still cannot connect using the telnet port 25. So it means that the
>port 25 is blocked on the router right?
>
Do you really have a router between the two systems or is it a switch (or hub) ?
What are the IP addresses of the two systems. If the only difference is in
the number at the end of the address eg 192.168.0.5  and 192.168.0.150 
then in 99.999% of cases they would be on the same segment and hence just have
a hub or switch between them.
(Note. Many home devices will provide a mixture of functionality with a 
single connection routed to the outside world and a collection of switched
ports for connecting internal systems).

Logically connecting systems to a switch is equivalent to them sitting on the 
same piece of wire and the only things which will be blocking connections 
between them will be things on the systems themselves

eg

A personal firewall running on the system

One of the first checks to make would be to login to the server box and see
whether you can telnet to it's own address on port 25.
If you can't then either

1) The mail server isn't started
2) It couldn't start properly because of configuration errors - check any 
   logs produced
3) A firewall running on the server is blocking connections


If the two systems are on different network segments ie there is a router
between them then is the default route on each system setup to point at the 
router IP address for it's own segment on each system ?


Once you have sorted out local connectivity on your home network then you can
start to look at connectivity to/from the outside world.
If the IP addresses you have are 

10.*.*.*
192.168.*.*
or
172.16.*.* - 172.31.*.*  (inclusive)

then you are using a private address range and your connection to the outside
world must be using NAT (probably provided by your Router).
You will need to consult your router documentation as to how to setup a
permanent NAT mapping to port 25 on your mailserver so that any connection from
the outside world on port 25 would be connected to your mailserver system.


I hope this is of some help. 


David Webb
Security team leader
CCSS
Middlesex University



>Any ideas on what to do now?
>
>
>believeryes wrote:
>> Thanks a lot.
>>
>> Yes i think i port 25 is blocked because i cannot telnet.
>>
>> The MX record IP address are uptodate, i just double checked it.
>>
>> Any ideas on how to make this work now that port 25 is blocked?
>>
>> Thanks a lot!!
>>
>> Jem Berkes wrote:
>> > "believeryes" <azzamqazi@gmail.com> wrote in news:1168568311.478034.206470
>> > @q2g2000cwa.googlegroups.com:
>> >
>> > > Thank you so much for the input guys. Well yeah i am using a dynamic ip
>> > > address but i am using zoneedit which takes care of it.
>> > >
>> > > Also now i am using the ISP outgoing smtp mail server and the mail is
>> > > going fine but i still cannot receive any emails. I have MX records
>> > > setup for my mail server and the MX records resolves to the right ip
>> > > address but i dont receive any emails. Any ideas on why i cannot
>> > > receive them?
>> > >
>> > > Is it because port 25 is blocked? I think incomming emails uses port
>> > > 110 right? How can i check if port 110 is blocked or not?
>> >
>> > Glad we could help.
>> >
>> > For incoming mail, it's still port 25. To test this, try to telnet into
>> > your IP address on port 25 from a remote host. Should be easy to test.
>> >
>> > Other reasons would be to make sure your MX record and all the hostnames
>> > are accurate and up to date. The problem with a dynamic IP is obviously
>> > that the IP address changes and you have to update the hostnames. Search
>> > google for "dns lookup tool" or "nslookup gateway" and see if your MX
>> > record and the hostname resolve to the correct IP address.
>> > 
>> > -- 
>> > Jem Berkes
>> > www.sysdesign.ca
>

Thanks a lot guys. I have looked at the routing services and zoneedit
doesnot provide such services only mail forwarding services.

Well i have a router which is provided by the ISP. Its Siemens 6520 and
its wireless. I IP address of the server is 192.168.2.7, thus its on a
local network. Then what i did was i went into the router and forwarded
the tcp port 25 to the server which is listening on port 25. Is that
right?

I turned the firewall off for checking purposes. I went into the server
and i did telnet 127.0.0.1 and it connected successfully. Then i  asked
my friend to try it from outside and it did'nt work so i think the port
is blocked.

So just wondering is there any other way beside purchasing routing
services? Is there any free routing services i can use?

Thanks a lot guys for all the help!!.


davi...@alpha1.mdx.ac.uk wrote:
> In article <1168570964.684516.143230@v45g2000cwv.googlegroups.com>, "believeryes" <azzamqazi@gmail.com> writes:
> >Also i tried connecting to the server from my own home network and it
> >still cannot connect using the telnet port 25. So it means that the
> >port 25 is blocked on the router right?
> >
> Do you really have a router between the two systems or is it a switch (or hub) ?
> What are the IP addresses of the two systems. If the only difference is in
> the number at the end of the address eg 192.168.0.5  and 192.168.0.150
> then in 99.999% of cases they would be on the same segment and hence just have
> a hub or switch between them.
> (Note. Many home devices will provide a mixture of functionality with a
> single connection routed to the outside world and a collection of switched
> ports for connecting internal systems).
>
> Logically connecting systems to a switch is equivalent to them sitting on the
> same piece of wire and the only things which will be blocking connections
> between them will be things on the systems themselves
>
> eg
>
> A personal firewall running on the system
>
> One of the first checks to make would be to login to the server box and see
> whether you can telnet to it's own address on port 25.
> If you can't then either
>
> 1) The mail server isn't started
> 2) It couldn't start properly because of configuration errors - check any
>    logs produced
> 3) A firewall running on the server is blocking connections
>
>
> If the two systems are on different network segments ie there is a router
> between them then is the default route on each system setup to point at the
> router IP address for it's own segment on each system ?
>
>
> Once you have sorted out local connectivity on your home network then you can
> start to look at connectivity to/from the outside world.
> If the IP addresses you have are
>
> 10.*.*.*
> 192.168.*.*
> or
> 172.16.*.* - 172.31.*.*  (inclusive)
>
> then you are using a private address range and your connection to the outside
> world must be using NAT (probably provided by your Router).
> You will need to consult your router documentation as to how to setup a
> permanent NAT mapping to port 25 on your mailserver so that any connection from
> the outside world on port 25 would be connected to your mailserver system.
>
>
> I hope this is of some help.
>
>
> David Webb
> Security team leader
> CCSS
> Middlesex University
>
>
>
> >Any ideas on what to do now?
> >
> >
> >believeryes wrote:
> >> Thanks a lot.
> >>
> >> Yes i think i port 25 is blocked because i cannot telnet.
> >>
> >> The MX record IP address are uptodate, i just double checked it.
> >>
> >> Any ideas on how to make this work now that port 25 is blocked?
> >>
> >> Thanks a lot!!
> >>
> >> Jem Berkes wrote:
> >> > "believeryes" <azzamqazi@gmail.com> wrote in news:1168568311.478034.206470
> >> > @q2g2000cwa.googlegroups.com:
> >> >
> >> > > Thank you so much for the input guys. Well yeah i am using a dynamic ip
> >> > > address but i am using zoneedit which takes care of it.
> >> > >
> >> > > Also now i am using the ISP outgoing smtp mail server and the mail is
> >> > > going fine but i still cannot receive any emails. I have MX records
> >> > > setup for my mail server and the MX records resolves to the right ip
> >> > > address but i dont receive any emails. Any ideas on why i cannot
> >> > > receive them?
> >> > >
> >> > > Is it because port 25 is blocked? I think incomming emails uses port
> >> > > 110 right? How can i check if port 110 is blocked or not?
> >> >
> >> > Glad we could help.
> >> >
> >> > For incoming mail, it's still port 25. To test this, try to telnet into
> >> > your IP address on port 25 from a remote host. Should be easy to test.
> >> >
> >> > Other reasons would be to make sure your MX record and all the hostnames
> >> > are accurate and up to date. The problem with a dynamic IP is obviously
> >> > that the IP address changes and you have to update the hostnames. Search
> >> > google for "dns lookup tool" or "nslookup gateway" and see if your MX
> >> > record and the hostname resolve to the correct IP address.
> >> > 
> >> > -- 
> >> > Jem Berkes
> >> > www.sysdesign.ca
> >

In article <1168619900.624750.9010@38g2000cwa.googlegroups.com>, "believeryes" <azzamqazi@gmail.com> writes:
>Thanks a lot guys. I have looked at the routing services and zoneedit
>doesnot provide such services only mail forwarding services.
>
>Well i have a router which is provided by the ISP. Its Siemens 6520 and
>its wireless. I IP address of the server is 192.168.2.7, thus its on a
>local network. Then what i did was i went into the router and forwarded
>the tcp port 25 to the server which is listening on port 25. Is that
>right?
>
Yes that should be correct.

>I turned the firewall off for checking purposes. I went into the server
>and i did telnet 127.0.0.1 and it connected successfully. Then i  asked
>my friend to try it from outside and it did'nt work so i think the port
>is blocked.
>
It does sound like it.

Is there any reason why you haven't told us which ISP this is ?
Someone on the list might be able to confirm their policy.
(If not then you could try contacting your ISP and asking them).


>So just wondering is there any other way beside purchasing routing
>services? Is there any free routing services i can use?

Not that I know of.
Of course one other solution would be to change ISP.


David Webb
Security team leader
CCSS
Middlesex University


>
>Thanks a lot guys for all the help!!.
>
>
>davi...@alpha1.mdx.ac.uk wrote:
>> In article <1168570964.684516.143230@v45g2000cwv.googlegroups.com>, "believeryes" <azzamqazi@gmail.com> writes:
>> >Also i tried connecting to the server from my own home network and it
>> >still cannot connect using the telnet port 25. So it means that the
>> >port 25 is blocked on the router right?
>> >
>> Do you really have a router between the two systems or is it a switch (or hub) ?
>> What are the IP addresses of the two systems. If the only difference is in
>> the number at the end of the address eg 192.168.0.5  and 192.168.0.150
>> then in 99.999% of cases they would be on the same segment and hence just have
>> a hub or switch between them.
>> (Note. Many home devices will provide a mixture of functionality with a
>> single connection routed to the outside world and a collection of switched
>> ports for connecting internal systems).
>>
>> Logically connecting systems to a switch is equivalent to them sitting on the
>> same piece of wire and the only things which will be blocking connections
>> between them will be things on the systems themselves
>>
>> eg
>>
>> A personal firewall running on the system
>>
>> One of the first checks to make would be to login to the server box and see
>> whether you can telnet to it's own address on port 25.
>> If you can't then either
>>
>> 1) The mail server isn't started
>> 2) It couldn't start properly because of configuration errors - check any
>>    logs produced
>> 3) A firewall running on the server is blocking connections
>>
>>
>> If the two systems are on different network segments ie there is a router
>> between them then is the default route on each system setup to point at the
>> router IP address for it's own segment on each system ?
>>
>>
>> Once you have sorted out local connectivity on your home network then you can
>> start to look at connectivity to/from the outside world.
>> If the IP addresses you have are
>>
>> 10.*.*.*
>> 192.168.*.*
>> or
>> 172.16.*.* - 172.31.*.*  (inclusive)
>>
>> then you are using a private address range and your connection to the outside
>> world must be using NAT (probably provided by your Router).
>> You will need to consult your router documentation as to how to setup a
>> permanent NAT mapping to port 25 on your mailserver so that any connection from
>> the outside world on port 25 would be connected to your mailserver system.
>>
>>
>> I hope this is of some help.
>>
>>
>> David Webb
>> Security team leader
>> CCSS
>> Middlesex University
>>
>>
>>
>> >Any ideas on what to do now?
>> >
>> >
>> >believeryes wrote:
>> >> Thanks a lot.
>> >>
>> >> Yes i think i port 25 is blocked because i cannot telnet.
>> >>
>> >> The MX record IP address are uptodate, i just double checked it.
>> >>
>> >> Any ideas on how to make this work now that port 25 is blocked?
>> >>
>> >> Thanks a lot!!
>> >>
>> >> Jem Berkes wrote:
>> >> > "believeryes" <azzamqazi@gmail.com> wrote in news:1168568311.478034.206470
>> >> > @q2g2000cwa.googlegroups.com:
>> >> >
>> >> > > Thank you so much for the input guys. Well yeah i am using a dynamic ip
>> >> > > address but i am using zoneedit which takes care of it.
>> >> > >
>> >> > > Also now i am using the ISP outgoing smtp mail server and the mail is
>> >> > > going fine but i still cannot receive any emails. I have MX records
>> >> > > setup for my mail server and the MX records resolves to the right ip
>> >> > > address but i dont receive any emails. Any ideas on why i cannot
>> >> > > receive them?
>> >> > >
>> >> > > Is it because port 25 is blocked? I think incomming emails uses port
>> >> > > 110 right? How can i check if port 110 is blocked or not?
>> >> >
>> >> > Glad we could help.
>> >> >
>> >> > For incoming mail, it's still port 25. To test this, try to telnet into
>> >> > your IP address on port 25 from a remote host. Should be easy to test.
>> >> >
>> >> > Other reasons would be to make sure your MX record and all the hostnames
>> >> > are accurate and up to date. The problem with a dynamic IP is obviously
>> >> > that the IP address changes and you have to update the hostnames. Search
>> >> > google for "dns lookup tool" or "nslookup gateway" and see if your MX
>> >> > record and the hostname resolve to the correct IP address.
>> >> > 
>> >> > -- 
>> >> > Jem Berkes
>> >> > www.sysdesign.ca
>> >
>