Gmail 550 5.7.24: suspicious entries in your SPF record

Short answer: Your SPF record allows too much (for example +all, ?all, huge IP ranges or ptr), so Gmail doesn't trust it. Fix: list only your real senders and end the record with ~all or -all.

The bounce looks like this
550-5.7.24 The SPF record of the sending domain has one or more suspicious entries.

What it means

Gmail does not trust what your SPF record allows – typically +all or ?all (anyone may send), huge IP ranges, or ptr mechanisms. Records like that make spoofing easy, so Gmail limits or blocks the mail.

How to fix it

  1. Run the checker – it flags +all, ?all, ptr and lookup problems.
  2. Rebuild the record with only your real senders using the SPF generator, ending in ~all or -all.
  3. Replace very wide ranges (like a whole /8 or /16) with the exact IPs or the provider's include.

Check your domain now

Rather not touch DNS? I set up SPF, DKIM and DMARC without breaking your other senders, with a before/after report.

Get it fixed on Fiverr

Prefer to do it yourself? Get the step-by-step Fix Kit ($15) – 19-page guide, checklist, 20+ providers.

Other bounce errors