- Plesk 12.5 for Linux
Greylisting does not turn off even when it is disabled for a domain.The following error can be found in
Nov 23 10:24:17 sr33 postfix/smtpd: warning: 126.96.36.199.list.dnswl.org: RBL lookup error: Host or domain name not found. Name service error for name=188.8.131.52.list.dnswl.org type=A: Host not found, try again
DNSWL whitelist is configured in
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, permit_dnswl_client list.dnswl.org=127.0.[2..15].0, permit_dnswl_client list.dnswl.org=127.0.5.1,
DNSWL whitelist is not supported by Plesk.
Remove the manually added DNSWL whitelist from Postfix by re-applying mail configuration from Plesk > Tools & Settings > Mail Server Settings > OK
Regarding DNSWL whitelist support, please, also refer to the following article .