Topic: Yet another (desperate) port25 question

[ChrisG]

I have been searching contribs.org all evening for the 'best' answer to my problem, and I still have more questions than answers.

My ISP blocks port25. No surprise there. Users can send and receive email through my (6.03b) server just fine inside my LAN, but outside they can only receive email.

I have a customer who has 4 POP3 accounts on my server. For months I have had them using 'mail.myserver.com' for incoming mail and their isp's 'mail.ispserver.com' for outgoing mail. This worked beautifully until they recently left their ISP and had a T-1 installed. The T-1 vendor provided NO email support whatsoever.

I need to restore for my client the ability to send emails. Volumes have been written on contribs.org about port forwarding, but all the material seems to be written for versions of the server before 6.03b.

Can someone who has addressed this problem tell me what worked best for them?

Thanks in advance,

Chris Gray

[wacko]

Hi Chris

I found this howto over at Jesper's site. This may help you if you can spool mail at another account. Not sure if it is what you require though

http://sme.swerts-knudsen.dk/howtos/howto_15.htm


wc

[Anonymous]

I appreciate the help, but I don't want to rely on an outside source for mail spooling. I think finding some way of using port 2525 for mail would be the best way to go, but I simply can't find a good source to explain how to get this working.

Thanks,

Chris G.

[MasterSleepy]

Hello,

I have same problem with my ISP.
Here is the solution I use.

I changer le port for the smtp server by changing value in the files /etc/services or the smtp entry.
After a reboot the smtp server listen on port that I specified in the file.
Now to server received email, I have to take abonnement with a relaying server, no-ip or dyndns. Unfortunatly I have to paid for that service .
The last step is to specified in the MX record of you DNS the server for the relay server from no-ip or dyndns.

Now it work perfectly from about 1 year

Regards,

[wacko]

from what I understand of your problem this should work, and restore the ability for your clients to send mail.


 
edit /etc/services and change the smtp port to 2525

smtp      2525/tcp      mail



and restart the mail server


/etc/rc.d/init.d/smtpfront-qmail restart


Check to see if you can connect to that port by telnet localhost 2525, if you get a banner up then all should be good!

you'll hafto ask somone else how to make this permanent via a template as am not to good in that area, but as a temporary fix (as long as u dont reboot) this should work fine.


Then getting your clients (if they use outlook) to change the default port to 2525  in advanced account settings and they should be able to send mail using your box.

[Chris G]

Thanks for the help! I wound up using a combination of the suggestions here and a tutorial on Iptables to get the fix I needed. Thanks again...

[Troy]

Any chance you could post more details on what worked?

My ISP just started blocking port 25, so I suddenly have to implement a workaround.

Any tips would be greatly appreciated.

Thanks,
Troy

[Todd]

if I'm not mistaken, you could also just have them FTP into your SME box and everything should work hunky-dory  

[wyron]

Any chance you could post more details on what worked?

My ISP just started blocking port 25, so I suddenly have to implement a workaround.

Any tips would be greatly appreciated.

Well, if you are running a server/gateway configuration with a fixed ip its really quite simple, and doesn't require any fiddling with the SME-server.
You probably use an external DNS-provider, and there's where you go.
Ask him to set up a backup-MX record pointing to your isp's mailserver with a lower priority (higher number) than the MX record for your own mailserver.
That's all, really.

[Mister Smith]

search a bit ... i used this successfully to let someone outside my network send authenticated SMTP traffic to my SME box, which relayed it via my ISP's smtp server.

[Mister Smith]

http://www.pagefault.org/code/e-smith/securemail/5.6/

Look at the bottom for SSMTP.

Works great!!!!!  Even has server manager panel ...

[ChrisG]

Anyone know if any progress is being made on a securemail contrib for 6.0?

[MikeH]

Am also looking for a contrib for Remote SMTP Authentication on SME 6, have had to revert back to SME 5.6 until I find one, clients not happy with alternatives.