Free scheduled and recurring emails for Gmail users.
Ranked in these QuestionsQuestion Ranking
Pro Allows future-scheduled or recurring emails on a very flexible basis
Con You have to give MailConductor access to your gmail account
One possible concern is if you are particularly worried about privacy.
Con Requires leaving the email in your drafts until you are done with it
MailConductor keeps track of the emails to send by specially formatted emails in your drafts folder.
Con Syntax for setting up is a bit technical
You have to add things like "@2017-07-01 04:00 repeat every month" at the end of the subject in your drafts folder. There is no convenient/intuitive interface to do this for you.