Upstream changes:
version 3.005: Wed 22 Jul 10:40:05 CEST 2020
Improvements:
- warn to use ::SMTP, not ::SendMail on bulk messages.
- much lower elapse time on ::SMTP (local?) delivery.
version 3.004: Fri 3 May 09:29:07 CEST 2019
Improvements:
- add imap/imap4
Mail::Transport extends Mail::Transport implement sending and/or receiving of
messages, using various protocols.
Mail::Transport::Send extends this class, and offers general functionality for
send protocols, like SMTP. Mail::Transport::Receive also extends this class, and
offers receive method. Some transport protocols will implement both sending and
receiving.
