When I try to send a mail from my Linux (CentOS) server, the exit status is 0, but the mail never reaches it's destination. The /var/log/maillog file has an entry something like this...
Mar 18 06:33:01 app11 postfix/qmgr: F18FD9F6074: to=<email@example.com>, relay=none, delay=0.01, delays=0/0/0/0, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to alt4.gmail-smtp-in.l.google.com[18.104.22.168]: Connection refused)
Am I blocked by google? I tried to send a mail to some other mail server and got the similar result.
Mar 18 06:33:01 app1 postfix/smtp: connect to acsinet11.xxx.com[111.222.333.444]: Connection refused (port 25)
How do I correct this problem?