SMTP only works when using SSL, why?

[Filipe Miranda]

Hello,

I just setup my Thunderbird e-mail client and I noticed that if I use the standard port 25 with no TLS or SSL, my connection times out and does not send the message.

If I enable SSL (port 465)it works.

TLS does not work as well...


Is it possible the set the standard smtp port connection??
Why is it not working? Any suggestions?
Also is it possible to enable TLS in qmail (without too much hassle?)

I also tired different email clients like Microsoft Outlook and Evolution, they only work when using SSL....

I checked the firewall and its not that....
When I try a simple test like a telnet on port 25... I do not get the STMP response.... if I do the same on the por 465 I do get the SMTP response.... Any ideas why?


Thank you,

Regards,
Filipe Miranda

 

[atomicturtle]

Most likely your ISP is blocking port 25.

 

[Monica@]

also check
/etc/xinetd.d/smtp_psa file, mine looks like:
service smtp
{
socket_type = stream
protocol = tcp
wait = no
disable = no
user = root
instances = UNLIMITED
server = /var/qmail/bin/tcp-env
server_args = -Rt0 /var/qmail/bin/relaylock /var/qmail/bin/qmail-smtpd /var/qmail/bin/smtp_auth /var/qmail/bin/true /var/qmail/bin/cmd5checkpw /var/qmail/bin/true
}

and qmail works on 25 port.

 

[Filipe Miranda]

Hello !!

After a lot of struggle I found out what it was!!

In my company, the smtp port 25 is blocked!!!

That's why only port 465 was working when I setup my e-mail client to use SSL.

Outside my company's network, for example in my home, qmail works fine with TLS and SSL.

Thanks a lot for all the suggestions!!
Next time I'll do a little more research before ask it here!

Thanks again!

Best,
Filipe Miranda