Alternatives to Maileroo Mail Tester
A free web tool that grades a test email for authentication, spam score, DNS and blacklists. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Maileroo Mail Tester
A free web tool that grades a test email for authentication, spam score, DNS and blacklists.
Replacements
Listings that take over the same core job as Maileroo Mail Tester.
Mail Tester
A web tool that scores how likely an email is to be marked as spam.
Mail Tester gives a simple spam score out of 10 for a sent message and offers an API, with less published detail on each check.
GlockApps
An online email deliverability tester that checks inbox placement, spam scores, blocklists and domain authentication.
GlockApps adds inbox placement results across major mail providers and shareable reports, while full seed-list testing requires a paid plan.
LearnDMARC
An interactive web console that visualizes how SPF, DKIM and DMARC evaluate a real email.
LearnDMARC tests a real message with a step-by-step visual of SPF, DKIM and DMARC alignment, without spam scoring or blacklist checks.
Postmark Spam Check
A free web tool and JSON API that returns the SpamAssassin score of an email message.
Postmark Spam Check returns only a SpamAssassin score through the browser or a JSON API, dropping Maileroo's authentication, DNS and blacklist checks.
Also worth comparing
These listings name Maileroo Mail Tester as their own alternative, so the relationship runs both ways.
DKIM Validator
Web tool that checks DKIM, SPF and SpamAssassin results for a test email you send.
Maileroo Mail Tester also grades a real sent message, adding blacklist, BIMI and MTA-STS checks and suggested DNS records, while promoting Maileroo's sending service.
EasyDMARC BIMI Lookup
Free online checker that retrieves a domain's BIMI record and validates its logo and VMC certificate.
Maileroo Mail Tester includes a BIMI check as part of grading a real delivered test message for authentication, spam score and blacklists, rather than looking up the record alone.
EasyDMARC DKIM Lookup
A free web tool that looks up and validates a domain's DKIM record for a given selector.
Maileroo Mail Tester shows every DKIM signature on a real delivered message instead of looking up a record by selector, and also grades spam score, DNS and blacklists.
MultiRBL
A free tool that checks a mail server IP against over 200 DNS blacklists and whitelists.
Maileroo Mail Tester checks blacklists as part of grading a real delivered test email, including authentication and DNS, one test at a time.
MXToolbox
A web-based suite of DNS, MX, SPF, DMARC and blacklist lookups for diagnosing email delivery.
Maileroo Mail Tester grades a real delivered message for SPF, DKIM, blacklists, BIMI and MTA-STS instead of running separate lookups per record.
MXToolbox Blacklist Check
An online tool that tests a mail server IP or domain against over 100 DNS blacklists.
Maileroo Mail Tester checks blacklists while grading a real test email for authentication, spam score and DNS, limited to one test at a time.
MXToolbox DKIM Lookup
A free web tool that tests whether a domain publishes a valid DKIM public key for a selector.
Maileroo Mail Tester shows every DKIM signature on a real delivered message, testing actual signing rather than only the published key.
Similar software
Related functionality, not a direct replacement.
Kitterman SPF Validator
Online SPF tools that retrieve and validate a domain's SPF record or test a draft record.
CheckTLS
A web tool that tests whether a recipient's mail server accepts secure TLS connections for email.
