Fix it yourself,in plain words.
The questions people ask when their mail lands in spam or their domain misbehaves, answered with the actual records. Each guide ends at a free check that tests it.
- Why your email goes to spam, and what to check firstMail from your domain lands in spam? Check these in order: SPF, DKIM, DMARC, reverse DNS, blocklists and TLS. What each one is and how to fix it.Read the guide
- How to set up DMARC, step by stepSet up DMARC without breaking your mail: publish p=none with reports, fix what fails, then move to quarantine and reject. With example records.Read the guide
- SPF 'too many DNS lookups' (PermError): how to fix itSPF allows at most 10 DNS lookups. Over that, SPF fails with a PermError. What counts, what does not, and how to get back under the limit.Read the guide
- What MTA-STS is, and how to set it upMTA-STS makes other mail servers use encryption when they send to you. A DNS record, a small policy file over HTTPS, and TLS-RPT to watch it.Read the guide
- How to move your email off Google Workspace or Microsoft 365Moving business email off Google Workspace or Microsoft 365 without losing mail: prepare DNS, copy over IMAP, switch MX, copy again, then cancel.Read the guide
- Email bounce codes explained: 550 5.7.26, 5.7.1, 5.1.1 and moreWhat an email bounce code means and how to fix it: 550 5.7.26, 554 5.7.1, 550 5.1.1, 421 4.7.0 and more, grouped by cause and in plain words.Read the guide
- How to spot a phishing email: seven checks that catch almost all of themSeven checks for spotting a phishing email: the real sender domain, links read from the right, Reply-To, SPF/DKIM/DMARC headers, attachments and pressure.Read the guide
- DKIM setup: how to turn it on and check that it worksHow to set up DKIM for your domain: where the key comes from, the DNS record to add, how to find your selector, and how to check signing works.Read the guide