Looks like I got it fixed. I added pcre entries to the helo_access file in /etc/postfix
/^barracuda.xxxx.com/ OK
/^207.777.88.999/ OK
Restarted postfix and seem to be getting emails from xxxx.com now.
This file as I understand it gets checked prior to the rest of the helo checks (it's early...
Currently looking at a pcre entry to the helo_access file. But frankly I'm scared to restart in case I kick everybody off and they come looking for my scalp :)
I have a Debian 8 ISPConfig server running postfix. It's been running fine for over a year. Now we have one company we can send to but not receive from. In the mail.log I find a rejection:
postfix/smtpd[6573]: NOQUEUE: reject: RCPT from mail.xxxxx.com[207.999.88.777]: 450 4.7.1...
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