Hi, I have a postfix-3.2.6 system that acts as a mail server and pop/imap using dovecot for a small domain. The problem is that people are increasingly using it as a relay to a personal account, such as Gmail and Yahoo.
This is resulting in the receiving system rejecting the message due to SPF failing. Sep 11 22:03:06 email postfix/smtp[1187]: 33AA3962A9648: to=< u...@example.com>, orig_to=<u...@origdomain.com>, relay=mx0.digitalwest.net[72.29.183.105]:25, delay=2.7, delays=0.05/0/1.5/1.1, dsn=5.0.0, status=bounced (host mx0.digitalwest.net[72.29.183.105] said: 550-[SPF] 44.104.18.100 is not allowed to send mail from mchat.booking.com. 550-Message blocked - Please check settings. See 550 http://support.digitalwest.net/KB/a163/550-spf-not-allowed-to-send-mail.aspx (in reply to RCPT TO command)) Is my only option here to do something like SRS or can this be fixed another way?
