Could you share the log messages that you see when trying to send a mail? On CentOS, this is usually found in /var/log/maillog They should give you an idea why the messages are being rejected.
It looks like your SMTP port may be filtered. Can you please open up a support ticket so that the support team can check that for you? If that's the case, they should be able to unblock it after verifying your account.
Could you share the log messages that you see when trying to send a mail? On CentOS, this is usually found in
/var/log/maillogThey should give you an idea why the messages are being rejected.Here Is the Log:
Sep 16 23:45:55 mail postfix/smtp[7823]: 60B121CA329: to=gutavinho@digital.com, relay=none, delay=44386, delays=44198/36/151/0, dsn=4.4.1, status=deferred (connect to digital.com[15.216.110.22]:25: Connection timed out)
Sep 16 23:46:03 mail postfix/smtp[7893]: connect to sbcgobal.net[208.73.211.183]:25: Connection timed out
Sep 16 23:46:03 mail postfix/smtp[7893]: D30EF1C9D75: to=sida6@sbcgobal.net, relay=none, delay=72651, delays=72464/66/121/0, dsn=4.4.1, status=deferred (connect to sbcgobal.net[208.73.211.183]:25: Connection timed out)
It looks like your SMTP port may be filtered. Can you please open up a support ticket so that the support team can check that for you? If that's the case, they should be able to unblock it after verifying your account.