A couple more options not mentioned. I suspect these were left out because they are thought of more as online/web oriented. However, both support using your own domain, SMTP-SSL-TLS/IMAP/ETC.

Yandex: https://domain.yandex.com/domains_add/

Zoho Mail: https://www.zoho.com/mail/zohomail-pricing.html

Edit: Appears both have limits on outbound emails/day. 500 for Yandex, 200 for the Zoho free plan.