It’s OK to relay mail for aliases that include foreign domains
Click this control if you want MDaemon to relay mail for Address Aliases regardless of your Relay Control settings.
Aliases are ignored if address matches an existing account or mailing list
Sometimes you may want to create an alias that will be applied to some addresses but not others when they match an existing account. For example: you could create an alias using a wildcard stating that “*@email@example.com” which would cause all messages containing “@example.org” to go to “firstname.lastname@example.org” even if the addresses matched existing accounts. But, with this control activated only addresses that didn’t match an account would have that alias applied to them.
Fully qualified aliases (no wildcards) are allowed to be list members
Click this checkbox if you want to allow address aliases to be members of MDaemon mailing lists. Only actual accounts can be list members if this control is not enabled. Note: address aliases containing wildcards are not permitted to be list members even if this control is enabled.
MAIL FROM ‘Postmaster’, 'abuse', 'webmaster' requires an authenticated session
Click this checkbox to require the postmaster, abuse, webmaster addresses to be authenticated before MDaemon will accept mail claiming to be from those addresses. This will prevent unauthorized users from being able to present themselves as these special accounts..
IP Shield honors aliases
Click this option if you want the IP Shield (Setup | Security Settings | IP Shielding…) to honor address aliases when checking domain/IP address shields. If IP Shield honors aliases is clicked, the IP Shield will translate an alias to the true account to which it points and thus honor it if it passes the shield. Without this option enabled, the IP Shield will treat each alias as if it is an address independent of the account that it represents. Thus, if an alias’ IP address violates an IP Shield then the message will be refused. This option is mirrored on the IP Shield editor—changing the setting here will be reflected on that dialog.
Replicate aliases to LDAP address book
Check this box if you want aliases to be replicated to the LDAP server. Alias replicated is necessary for the Remote verification process to work correctly.
Use recursive aliasing
When enabled, any match to the alias list causes the resulting value to be reprocessed back through the entire alias listing again. With this option you can layer your aliases up to 10 levels deep.