Hi, I know this isn't an email server support forum, per se. But I am wondering if GF has any settings that might help.
Most email sent from GF goes through just fine.
Some messages are bounced back with this error:
Subject: Mail delivery failed: returning message to sender
SMTP error from remote mail server after MAIL FROM:<firstname.lastname@example.org> SIZE=9997:
host mail-relay.msln.net [22.214.171.124]: 550 5.5.4 <email@example.com>... Domain of sender address firstname.lastname@example.org refused. MX points to hosts without valid addresses. This violates RFC 1035/2181.
Any clues as to how to fix this? Thanks.