Zimbra is up & running sending & recieving mail but I am getting occasional errors. My setup is Zimbra is behind a firewall and I have a DNS server supplying Postfix with the private IP of the server so it will deliver mail locally. The vast majority of the mail is going out but a few aren't making it.
1. Nov 2 16:47:39 mail postfix/smtp: 330FE4314F4: to=<firstname.lastname@example.org>, relay=xyz.com[18.104.22.168], delay=0, status=bounced (host xyz.com[22.214.171.124] said: 550 5.7.1 Unable to relay for email@example.com (in reply to RCPT TO command))
I had this problem with a couple of domains yesterday & turned off strict rfc821 envelopes and those domains will now accept mail. This is new today.
2.Nov 2 16:51:59 mail postfix/smtp: BD6944314F4: to=<firstname.lastname@example.org>, relay=none, delay=0, status=bounced (cfl.rr.com: Name or service not known)
I'm getting a few of these from different domains. This one won't resolve with ping but does show up in dig.
Any help would be appreciated