Configuring Postfix
by NetEng1 from LinuxQuestions.org on (#54N4E)
It has been about 8 years since I had to do this, but I find myself having to do it again. We have installed postfix on a Fedora server. When I configured it before, albeit many years ago, I used port 25 without a relay server defined and it used to go out and find the destination and deliver the mail. Now I get connection timed out.
Jun 15 18:19:46 klinux postfix/smtp[1641]: connect to gmail-smtp-in.l.google.com[209.85.201.27]:25: Connection timed out
Jun 15 18:20:16 klinux postfix/smtp[1641]: connect to alt1.gmail-smtp-in.l.google.com[64.233.186.26]:25: Connection timed out
Jun 15 18:20:46 klinux postfix/smtp[1641]: connect to alt2.gmail-smtp-in.l.google.com[209.85.202.26]:25: Connection timed out
Jun 15 18:21:16 klinux postfix/smtp[1641]: connect to alt3.gmail-smtp-in.l.google.com[74.125.206.26]:25: Connection timed out
I am assuming that is because people do not like to use port 25 anymore for security reasons. If I configure the system for 587 I assume I need to configure TLS, but do I need to configure a relay so I can authenticate?
Just trying to understand how things are done now-a-days.
Jun 15 18:19:46 klinux postfix/smtp[1641]: connect to gmail-smtp-in.l.google.com[209.85.201.27]:25: Connection timed out
Jun 15 18:20:16 klinux postfix/smtp[1641]: connect to alt1.gmail-smtp-in.l.google.com[64.233.186.26]:25: Connection timed out
Jun 15 18:20:46 klinux postfix/smtp[1641]: connect to alt2.gmail-smtp-in.l.google.com[209.85.202.26]:25: Connection timed out
Jun 15 18:21:16 klinux postfix/smtp[1641]: connect to alt3.gmail-smtp-in.l.google.com[74.125.206.26]:25: Connection timed out
I am assuming that is because people do not like to use port 25 anymore for security reasons. If I configure the system for 587 I assume I need to configure TLS, but do I need to configure a relay so I can authenticate?
Just trying to understand how things are done now-a-days.