Suntwist Promo Engine

Email Deliverability

SPF / DKIM / DMARC alignment checklist and live DNS status for your sending domain.

Sending Domain DNS
Live lookup against public resolvers. Run after any DNS change; propagation can take up to 72 hours.
Run a DNS check to see the live status of NS, SPF, DKIM, DMARC, and MX records.
SPF / DMARC Alignment Checklist
DMARC passes only when SPF or DKIM is aligned with the From: domain. Use this list before changing senders.
  1. 1
    From: domain matches an authenticated domain

    The visible From: address (noreply@notify.example.com) must align with the DKIM d= domain or SPF MAIL FROM domain — at least one is required for DMARC pass.

  2. 2
    SPF: organizational domain alignment

    The Return-Path / bounce domain must share the org domain of the From: header (relaxed alignment) or match exactly (strict).

  3. 3
    DKIM: signing domain alignment

    The d= tag in the DKIM-Signature header must equal the From: domain (strict) or share its org domain (relaxed). Lovable signs with d= equal to the sender subdomain.

  4. 4
    DMARC record published at org domain

    Publish v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain — start at p=none only while monitoring reports.

  5. 5
    Consistent From: across all senders

    Every system sending on the brand (auth, app emails, support) should use the same sender subdomain so reputation accumulates in one place.

  6. 6
    Suppression hygiene

    Honor bounces and complaints — sustained hard-bounce or complaint rates cause inbox providers to ignore your alignment regardless of SPF/DKIM.