Question Locked
Error transferring to mx1.domain.COM; SMTP Protocol Returned a Permanen
0 helpful
2 replies
Closed to new repliesThis discussion is closed. It stays readable, but it takes no new replies.
Recently,a user cannot send email to this customer, with Delivery Failure report as below:
Error transferring to "mx1.DOMAIN.COM"; SMTP Protocol Returned a Permanent Error 550 failed to meet SPF requirements
He cannot send to this customer only.
Of course, We don't have going out filter.
Lotus 8.0
Barracuda firewall.
Please help me ... !