This seems like it should be a given but all I get is:
Remote Server returned: 'The recipient does not exist'
Conditions:
Works: username+Vendors@mydomain.com
Fails: useralias+Vendors@mydomain.com
Where useralias is under the alias tab and sends only to username@mydomain.com
It seems this should be have equivalent behavior. Looking on the docs for plus addressing, it doesn't say "will not work for email aliases".
Clarification?
Additional Information
Works: username+Vendors@basedomain.com
Fails: useralias+Vendors@basedomain.com
Fails: username+Vendors@aliasdomain.com
Fails: useralias+Vendors@aliasdomain.com
In short, you can't send to any alias domain or user... only the account user name and primary domain will work. This seems like a terrible limitation.