Alternatives to Google Postmaster Tools
Google's web dashboard for checking a sending domain's reputation and mail deliverability to Gmail. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Google Postmaster Tools
Google's web dashboard for checking a sending domain's reputation and mail deliverability to Gmail.
Replacements
Listings that take over the same core job as Google Postmaster Tools.
Microsoft SNDS
Microsoft portal that shows senders how Outlook.com rates mail coming from their IP addresses.
Microsoft SNDS gives reputation data for Outlook.com instead of Gmail, requires verified control of IP ranges and periodic reattestation, and adds a junk email feedback loop.
Sender Score
Free web tool from Validity that rates the email sending reputation of an IP address or domain.
Sender Score rates an IP or domain using Validity's own data rather than a mailbox provider's, needs no account for a quick score, and promotes paid email services.
GlockApps
An online email deliverability tester that checks inbox placement, spam scores, blocklists and domain authentication.
GlockApps tests inbox or spam placement across several major mail providers rather than Gmail alone, but full seed-list testing requires a paid plan.
Similar software
Related functionality, not a direct replacement.
Postmark DMARC Digests
Free service that turns a domain's DMARC reports into readable weekly email summaries.
MXToolbox Blacklist Check
An online tool that tests a mail server IP or domain against over 100 DNS blacklists.
Spamhaus IP and Domain Reputation Checker
Online lookup that shows whether an IP address or domain appears on Spamhaus blocklists.
Mail Tester
A web tool that scores how likely an email is to be marked as spam.
MultiRBL
A free tool that checks a mail server IP against over 200 DNS blacklists and whitelists.
LearnDMARC
An interactive web console that visualizes how SPF, DKIM and DMARC evaluate a real email.
