Use free checklists and templates to map senders and diagnose failures

Copy a sender inventory, review a business email checklist, read headers and DMARC reports, or compare tool costs without creating an account.

People reviewing notes and information beside laptops.

Use free checks to collect evidence before buying software

A DNS lookup, header analyser, reputation check and provider dashboard answer different questions.

Run useful free email checksCheck authentication, records, reputation and provider signals without relying on one score.Read an original message headerFind the sending route, authentication results and provider handling.Read a DMARC aggregate reportIdentify sending sources, volume, authentication and alignment.Check a blocklist warningConfirm the listed asset and real delivery impact before reacting.

Use checklists to capture ownership, evidence and rollback

A written record reduces the risk of changing the wrong route or forgetting a legitimate sender.

Review a small-business email setupRecord access, DNS ownership, senders, authentication and monitoring.Document a delivery incidentCapture the symptom, affected route, provider response, tests, change and result.Check provider requirementsReview dated Gmail, Yahoo and Microsoft guidance against the original sources.

Copy templates for sender and domain ownership

Use these structures in your own records without supplying your domain or email address to SenderCompass.

Copy the sender inventory templateList every service, domain, owner, DNS contact and review date.Review DMARC record examplesUnderstand the purpose and risk of common records before adapting one.Structure a multi-domain reviewKeep brands, clients, subdomains and non-sending domains separate.

Compare tool cost and support choices

Price alone misses credits, limits, VAT, exports, staff time and the cost of unclear ownership.

Calculate email deliverability tool costCompare subscriptions, credits, renewal terms, taxes and operational time.Choose between free checks, monitoring and specialist helpMatch the category to the question, workload, control and support you need.

Check authentication terms without losing the practical context

Use the glossary for a definition, then follow the linked guide for the business decision or diagnostic check.

Use the email authentication glossaryLook up SPF, DKIM, DMARC, alignment and reporting terms.See SPF and DKIM in contextUnderstand what each method authenticates and how DMARC uses the result.Understand aligned identitiesCompare the visible From domain with authenticated SPF and DKIM domains.

Use dated provider guidance for changing requirements

Always confirm current original documentation before changing a live sending system.

Review Gmail, Yahoo and Microsoft requirementsSeparate all-sender requirements from additional bulk-sender duties.Check a current Gmail rejectionUse the actual SMTP response and authentication evidence.Understand one-click unsubscribe requirementsSee where RFC 8058 support applies and what else the sender must provide.Review DMARC enforcement safelyUse report evidence and sender ownership rather than moving policy by assumption.