By Merroway

Your business email is broken.
Fix it, step by step, and prove it worked.

We write fix guides for the moment you are actually stuck: the exact error on your screen, what it means in plain words, the fix in the right order, and a check at the end that proves it worked. Every record and setting is verified against the vendor's own official documentation before it is published.

Start with the 550 5.7.515 / 5.7.509 fix

Latest fixes

Outlook · Microsoft 365 · DMARC 550 5.7.515 / 5.7.509 “Access denied” — your domain’s email is being rejected

Two different errors that look alike. Which one you have decides the fix — and the fix is almost never the one you have already tried. Diagnose first, then SPF, DKIM, DMARC, in that order.

Shopify · Deliverability · DNS Shopify emails going to spam — or arriving from “shopifyemail.com”?

Your sender domain is not authenticated. The fix per DNS host — GoDaddy, Cloudflare, Namecheap — without breaking your Google Workspace or Microsoft 365 email.

SPF · DNS SPF PermError: “too many DNS lookups” — count it, clean it, fix it

The real price list for every common include (counted from live DNS), a 12-term record cleaned to 2, and why only some of your mail bounces.

How every guide here is built

Diagnose before you change anything

Each guide starts with a 5-minute test that proves which part is failing, so you never “fix” the wrong thing first.

Verified against official sources

Record values, portal paths and limits are taken from the vendor’s own documentation and cited inline, at the exact claim.

A proof step, not a promise

Every fix ends with the check that shows it worked — the header lines to read, the tool to use, the result to expect.

A ladder if it still fails

If the main fix does not take, each guide ends with the next causes in order, including the honest last rung.

Written for the person who already tried

Most email guides are written for someone setting up fresh. Ours are written for the owner whose invoices, order confirmations or customer replies are bouncing right now — after two or three failed attempts, with a p=reject policy, a missing DKIM key, or one tool too many in the SPF record. If that is you, start with the fix above. Work through it in order. It ends with proof.