Check addresses now option to cause
Ishmail to send all
the addresses you have entered into the header fields to the
sendmail program, which will validate whether they can be used
to deliver mail.
If one or more addresses are outside of your
local network, it may take a while for this
operation to complete.
Preceding Section: Add Container Option
Following Section: Save Mail Template
Parent Section: Composition Message Menu
Contents of Ishmail User's Guide