Popbeforesmtpkludgechannel Option

Deleted in release: 8.1

The submit proxy and this option have been removed from the Messaging Server 8.1 (tezpur) release.

The  SUBMIT Proxy or Virtual Domain option specifies the name of an MTA channel to use for POP before SMTP  authorized connections. The default is empty and the typical setting for users who want to enable POP before SMTP is.