
Aster Mail
9.2#1 in email providersFrom $2.42 a monthFree planAndroidiOSWebLinux
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Aster Mail may suit people seeking an open-source email service with encrypted mail between Aster accounts and desktop mail app access. It also has import options for users moving from named providers or other IMAP services.
Shutbox may suit people seeking a private email service with custom domains, aliases, and a web inbox. Its plan options vary by storage, alias, and daily outbound-email limits.