Symptoms
Outgoing messages from Plesk domain example.com to an external one example.net are rejected with the following error:
550 Message rejected for policy reasons (1.1.1.2)
BST - Please refine your SPF record for example.com using best
practice. Guide for bulk senders www.example.net/bulksender (in reply to MAIL FROM command)
Cause
Incorrect SPF policy is set in SPF DNS record.
Resolution
-
Go to the tab Domains > example.com > DNS Settings
-
Edit the SPF record and change “
+all
” value to “~all
” or “-all
“.
OR
Replace the SPF record value with default one:v=spf1 +a +mx +a:example.com -all