What are some alternatives?
Dimelo Mail - Dimelo Mail is a software that manage inbound emails.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
MailClark - The Slack bot for external communications
Roundcube - Web-based IMAP email client
CleanEmail - CleanEmail is an online service that empowers you to take control of your mailbox.
Gmail - Gmail is a free search-based web-mail service.