MX records for 123mail.org
Live MX lookup for 123mail.org: 2 mail hosts, run by Fastmail.
try:
- mail hosts
- in1-smtp.messagingengine.com, in2-smtp.messagingengine.com
- provider
- fastmail
- spf record
- v=spf1 include:spf.messagingengine.com ~all
- dmarc policy
- none
- dmarc record
- v=DMARC1; p=none; rua=mailto:[email protected]
- disposable domain
- no
- free consumer provider
- yes
Mail servers for 123mail.org
DNS lists 2 mail hosts for 123mail.org, starting with in1-smtp.messagingengine.com. Lower priority values are tried first; the rest exist for failover.
Who runs the mail
The hosts match the pattern of Fastmail. Fastmail hosts the mailboxes and answers the handshake honestly, so an address that does not exist is rejected outright and verdicts are definitive.
What this means for verification
For 123mail.org, verification runs the whole pipeline: syntax, live MX, the open lists, and then the SMTP handshake with the mail host, with no message ever transmitted. Each verdict carries a machine-readable reason.
More checks for 123mail.org
checked 2026-09-03 · sources: live-dns 2026-09-03 · disposable-domains 2026-09-02 · free-provider-domains 2026-09-02 · mx-provider-patterns 2026-09-03
Need this at scale?
The Spaw API runs the same checks plus mailbox-level SMTP verification, batch and bulk endpoints, and list monitoring — 10 free lookups a month, no card required.