envelope from address spoofing

[Robert Marianski]

When sending any message from karl, the envelope from address needs to be set as from a legitimate domain for that machine, possibly the system domain. Otherwise, mail servers can block the messages, thinking that it is spoofed or spam.

The from header in the message is separate, and can remain whatever it needs to be. This change just needs to be made for the envelope from (the smtp "Mail From:")

[Chris Rossi (chris-archimedeanco)]

I've added a new setting to Karl: 'envelope_from_addr'. All outgoing mail now uses the value of this setting as the envelope from address. If this setting is not set explicitly, it defaults to: karl@<system_email_domain>. This should alleviate the need for any currently running Karl instances to update their configuration.

[JimPGlenn (jpglenn09)]

fixed