DevOps
Linux Systems Engineer
- Joined
- Oct 18, 2019
- Messages
- 218
- Reaction score
- 23
- Points
- 18
- Location
- Novosibirsk, Russia
- Website
- addons.vevioz.com
Offline
Checking HELO/EHLO names is recommended by the SPF RFC. Publishing records for these hostnames is an important part of the SPF protocol. HELO/EHLO is used when Mail from is <> even if a receiver does not do 100% HELO checking.
Publishing a HELO/EHLO rule involves creating an SPF record linked to the HELO/EHLO FQDN used by your mailserver (example: "mailserver.example.com"). Normally this should be an entirely separate SPF rule to the one which checks the from addresses in your domain which might be associated with say "example.com". A simple example of two policies might be:
Publishing a HELO/EHLO rule involves creating an SPF record linked to the HELO/EHLO FQDN used by your mailserver (example: "mailserver.example.com"). Normally this should be an entirely separate SPF rule to the one which checks the from addresses in your domain which might be associated with say "example.com". A simple example of two policies might be:
Code:
example.com. IN TXT "v=spf1 mx -all"
mailserver.example.com. IN TXT "v=spf1 a -all"