I have set up iRedMail in a VPS environment and I can receive global emails and send emails to my own domain. Whenever I send to a place like gmail I get Code: Oct 7 19:00:51 mail postfix/smtp[8091]: C3F2E4118D: to=<[email protected]>, relay=none, delay=1206, delays=1174/0.07/32/0, dsn=4.4.1, status=deferred (connect to mail-tester.com[94.23.206.89]:25: Connection timed out) Oct 7 19:01:20 mail postfix/smtp[8093]: connect to alt1.gmail-smtp-in.l.google.com[74.125.131.27]:25: Connection timed out Oct 7 19:01:20 mail postfix/smtp[8093]: connect to alt2.gmail-smtp-in.l.google.com[2404:6800:4003:c02::1b]:25: Network is unreachable Oct 7 19:01:20 mail postfix/smtp[8093]: 52AFE411C0: to=<[email protected]>, relay=none, delay=706, delays=646/0.05/60/0, dsn=4.4.1, status=deferred (connect to alt2.gmail-smtp-in.l.google.com[2404:6800:4003:c02::1b]:25: Network is unrea chable) I am root and do not know what to do. If anyone asks for a part of my conifg I will post it here as I don't know what parts may or may not be needed
does it happen to other servers aswell? can you for example netcat/telnet to remote server on port 25? looks like either you have some kind of firewall blocking outgoing traffic on port 25 or your ISP has, is that VPS environment behind some firewall? is it located in a proper datacentre or behind some dsl/landline > then likely your ISP blocking port 25 outgoing
