How the message gets sent

There are options to control whether the message is sent authentically, whether xzewd waits to see if your message was sent successfully, and an option to set your signature. Thus, you can have a different signature for each instance if you use aliases properly. Options specified in the destination take precedence over the corresponding options in the Sender Options dialog and the Signature dialog.
-a
Sends the message authenticated.
-d
Sends the message unauthenticated. This is slightly faster than -a.
-v
Acknowledges if the message was sent.
-q
Does not acknowledge if the message was sent. This is slightly faster than -v.
-s word
Sends the message with signature word.