Running Ubuntu, iRedMail, Mysql, Amavis, Spamassassin, Dovecot, Postfix
Recently had some unauthorized usage of a postfix server internally from a malware deprecated staging server. I worked on hardening the install but now external sasl logged in users can no longer send email.
May 3 15:35:07 nexus postfix/smtpd: NOQUEUE: reject: RCPT from tld.com[100.100.x.x]: 554 5.7.1 <tld.com[100.100.x.x]>: Unverified Client host rejected: Generic - Please relay via ISP (tld.com); from=<firstname.lastname@example.org> to=<email@example.com> proto=ESMTP helo=<[10.10.10.10]>
main.cf: https://pastee.org/pcfvn [now a 404]
master.cf: https://pastee.org/22y8f [now a 404]
I did look at: Postfix rejecting mail from authenticated clients but it didn't seem to be my problem or at least not conventionally.
I think I've read enough that I've gone temporarily blind with information. If anyone sees the needle in my haystack, your attention is appreciated.