Allowanonymouslogin Option
From MsgServerDocWiki
If 1, enables the SASL ANONYMOUS login mechanism for the selected server.
Use with webmail
This enables the SASL ANONYMOUS mechanism.
The default value in this context is: 0
Use with imap
This enables the SASL ANONYMOUS mechanism for use by IMAP.
The default value in this context is: 0
Use with pop
Sets whether or not anonymous login is allowed.
The default value in this context is: 0
