Each guide is one specific problem worked through in the order that actually fixes it — what's happening, what to check, the exact records involved, and when to stop and get help.
Free Guides
In-depth, plain-English guides for the most common ways business email ends up in spam.
The causes, in the order to check them — authentication first, then reputation, then content.
Sudden breakWorking mail that broke without you touching it: enforcement, a new sender, a broken record, volume, or reputation.
The fixThe fix in working order — test, SPF, DKIM, DMARC, re-test — and what not to do along the way.
DMARCThe record, the report address, and the staged rollout that doesn't break your own mail.
SPFThe 10-lookup limit, which senders secretly eat half of it, and the two real ways out.
MailchimpAuthenticate your domain in Mailchimp with the right CNAMEs — k1 vs k2/k3 explained.
Google WorkspaceThe authentication checklist for business Gmail: SPF, the 2048-bit DKIM key, and DMARC.
DMARCWhat each DMARC policy actually does, and how to know when you're ready to move up.
Microsoft 365DKIM is off by default for your domain — the full Microsoft 365 authentication pass.
The guides explain each problem. The free wizard builds the actual records for your domain — your merged SPF with the lookup count checked, the DKIM steps for each of your senders, and your DMARC plan in stages. If you want the registrar click-by-clicks and the DMARC report reader too, that's the $29 Email Authentication Kit.
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