Wiki· Updated 17 Oct 2026
How to fix
Step-by-step fixes for what RunStack utilities find: email, TLS, HTTP headers.
RunStack utilities don't just find a problem — they link here: every common finding has a page with what's wrong, how to check and how to fix it.
- Email — SPF, DKIM, DMARC and PTR: everything that sends mail to spam. Check with Email DNS Checker.
- TLS and certificates — chain, legacy protocols, expiry. Check with SSL Checker.
- HTTP headers — HSTS and other security headers. Check with HTTP Inspector.
After a fix, check the domain again: the finding should be gone.