Go for Yandex 360 (formerly Yandex Mail for domains) Key points: - Absolutely free - Add your domains - Set DMARC, DKIM & SPF - Almost unlimited storage fo

Go for Yandex 360 (formerly Yandex Mail for domains) Key points: - Absolutely free - Add your domains - Set DMARC, DKIM & SPF - Almost unlimited storage for emails - Adding multiple users (email accounts) free - Additional features included like Drive, Docs etc. Note: We use it for FreeTools.Dev (https://freetools.dev https://freetools.dev) and it works very well (such as SMTP delivery)