Alternatives to MXToolbox Blacklist Check
An online tool that tests a mail server IP or domain against over 100 DNS blacklists. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
MXToolbox Blacklist Check
An online tool that tests a mail server IP or domain against over 100 DNS blacklists.
Replacements
Listings that take over the same core job as MXToolbox Blacklist Check.
MultiRBL
A free tool that checks a mail server IP against over 200 DNS blacklists and whitelists.
MultiRBL checks over 200 blacklists and whitelists with IPv4, IPv6 and FCrDNS support, more lists than MXToolbox, in a plainer technical interface.
MXToolbox
A web-based suite of DNS, MX, SPF, DMARC and blacklist lookups for diagnosing email delivery.
MXToolbox's full suite adds MX, SPF and DMARC lookups to the blacklist check, with freemium pricing and prompts for the paid service.
GlockApps
An online email deliverability tester that checks inbox placement, spam scores, blocklists and domain authentication.
GlockApps combines blocklist checks with inbox placement, spam scores and domain authentication, with full seed-list testing on a paid plan.
Maileroo Mail Tester
A free web tool that grades a test email for authentication, spam score, DNS and 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.
HetrixTools
A hosted uptime, server metrics and blacklist monitoring service with a free tier and instant alerts.
HetrixTools turns blacklist checking into ongoing monitoring with alerts on a free tier, but requires an account on its hosted service.
Also worth comparing
These listings name MXToolbox Blacklist Check as their own alternative, so the relationship runs both ways.
Barracuda Reputation Lookup
Online lookup that checks whether an IP address or domain is listed in the Barracuda Reputation System.
MXToolbox Blacklist Check tests an IP or domain against over 100 DNS blacklists in one pass, but does not remove listings.
Sender Score
Free web tool from Validity that rates the email sending reputation of an IP address or domain.
MXToolbox Blacklist Check tests an IP or domain against over 100 DNS blacklists at once, but gives no reputation score or removal.
Spamhaus IP and Domain Reputation Checker
Online lookup that shows whether an IP address or domain appears on Spamhaus blocklists.
MXToolbox Blacklist Check tests an IP or domain against over 100 DNS blacklists in one pass instead of only the Spamhaus lists.
Similar software
Related functionality, not a direct replacement.
Cisco Talos Reputation Center
Online lookup for Cisco Talos reputation and threat intelligence on IP addresses and domains.
Mail Tester
A web tool that scores how likely an email is to be marked as spam.
URLVoid
Website reputation checker that looks up a domain against more than 30 blocklist services.
MXToolbox DKIM Lookup
A free web tool that tests whether a domain publishes a valid DKIM public key for a selector.
Google Postmaster Tools
Google's web dashboard for checking a sending domain's reputation and mail deliverability to Gmail.
