Merge branch 'mjog/1079-mesage-id-from' into 'mainline'

Geary.Smtp.ClientService: Get default Message-Id domain from From

Closes #1079

See merge request !644

(cherry picked from commit 9bf73077)

bc7ec8dd Geary.Smtp.ClientService: Get default Message-Id domain from From
3 jobs for cherry-pick-9bf73077 in 129 minutes and 24 seconds (queued for 1 second)