Email authentication is the set of standards that let receiving mail servers verify an email genuinely comes from the domain it claims — chiefly SPF, DKIM, and DMARC, with BIMI for verified logos. Together they stop spoofing, and they are now required by Gmail and Yahoo for bulk senders.
How it works
SPF lists the servers allowed to send for your domain, DKIM adds a tamper-proof signature, and DMARC tells receivers what to do when checks fail — while BIMI can display your logo. Mailpro guides the setup: DKIM configuration and SPF configuration.
Why it matters
Without authentication, your mail is spoofable and likely to land in spam — or be rejected outright by major providers. Setting it up is one of the highest-impact deliverability steps. See what SPF, DKIM, and DMARC are. Related: deliverability and email spoofing.
Mailpro and email authentication
Authenticate your domain, land in the inbox
Mailpro helps you set up SPF, DKIM, and DMARC and sends from authenticated infrastructure by default.