Mails refused back in error 550 5.7.1
Since we migrate on Zimbra we got sometime mails refused in error 550 5.7.1 as:
These addresses had no problems before, have you an explication ?
<firstname.lastname@example.org>: host gw.aflo.be[188.8.131.52] said: 550 5.7.1 Your email
messages have been blocked by the recipient OR by Trend Micro Email
Reputation Service. Contact the recipient or his/her administrator using
alternate means to resolve the issue. (in reply to RCPT TO command)
Thanks in advance.
Release 6.0.7_GA_2473.DEBIAN5 DEBIAN5 FOSS edition.
On Debian Vserver