Question
How to configure host mail and SPF record in Plesk if DNS is hosted externally?
Answer
Create the following records on external DNS:
Host Record Type Value
example.com. MX (10) mail.example.com.
mail.example.com. A <localServer.IP>
webmail.example.com. A <localServer.IP>
Note: Replace <localServer.IP> with the Plesk server IP address.
If an SPF record exists for a domain, the corresponding record should be created as well:
Host Record Type Value
example.com. TXT v=spf1 +a +mx ip4:<localServer.IP> -all
For mail autodiscovery to work it is also required to create SRV records manually on the external DNS:
_imaps._tcp.example.com. SRV example.com.
_pop3s._tcp.example.com. SRV example.com.
_smtps._tcp.example.com. SRV example.com.