What are some alternatives?
When comparing MailStore and MailSteward, you can also consider the following products
Gmvault - Backup the emails in your Gmail account.
Piler - Piler is an open source email archiving solution with all the necessary features for your enterprise
KLS Mail Backup - KLS Mail Backup is an easy to use backup program that allows you to back up and restore your...
Mail Backup X - Your one stop mail backup and archiving tool for Mac.
imapsync - Console-based utility for migrating IMAP mailboxes.
Got Your Back - Got Your Back (GYB) is a command line tool that backs up and restores your Gmail account.