can not send mail by port 25 but can with SSL on port 465

senzacionale asked:

netstat -tunlp | grep :25
(No info could be read for "-p": geteuid()=1000 but you should be root.)
tcp        0      0 0.0.0.0:25              0.0.0.0:*               LISTEN      -
tcp6       0      0 :::25                   :::*                    LISTEN      -

i am having problem sending mails with postfix. I can send it by SSL and port 465 but not with port 25. When I use port 25 i can’t get any error in /var/log/mail.log or mail.err

Port is opened:

telnet agadomarketing.com 25
Trying 84.255.253.186...
Connected to agadomarketing.com.
Escape character is '^]'.
220 mail.agadomarketing.com ESMTP Postfix

when i send by roundcube mail i get this:

Jul 15 10:06:07 ubuntu-server postfix/smtpd[9272]: lost connection
after UNKNOWN from localhost[127.0.0.1] Jul 15 10:06:07 ubuntu-server
postfix/smtpd[9272]: disconnect from localhost[127.0.0.1]

generally error

SMTP Error (-1): Connection to server failed

EDIT:

my /etc/hosts

127.0.0.1      localhost
127.0.1.1      ubuntu-server.agadomarketing.com        ubuntu-server

what can be wrong? Is etc/hosts correct?

My answer:


Most likely your Internet Service Provider is blocking outgoing connections on port 25. This is very common with residential cable and ADSL connections.


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