Gmail Promotions Tab: Annotations Preview

Email annotations bring your promotions to life with images, deals, expiration dates and more.

Blacklist Checker

Instantly check an IP or domain against major email blacklists including Spamhaus, SURBL, SORBS, and more.


Use Blacklist Checker


CIDR to IP Range

Enter a CIDR notation to instantly convert it to an IP range.


Use CIDR to IP Range

SPF Analyzer

SPF is a method to prevent email sender address forgery. Enter your domain to analyze its SPF record.


Use SPF Analyzer


IP Range to CIDR

Enter a IP range to instantly convert it to a CIDR notation.


Use IP Range to CIDR

DMARC Wizard

Enter your domain to analyze your DMARC record or create a DMARC policy for your domain.


Use DMARC Wizard


DNS Lookup

Perform a DNS lookup against multiple widely used nameservers.


Use DNS Lookup

Resources for #SeriousSenders


See you at M3AAWG 48 in San Francisco!

A new decade and another M3AAWG! We’re excited to head back to San Francisco to kick off the event on February 17 with drinks. If you’re planning to be there, why don’t you come by to hang out with us? We’re hosting a party at The Wreck Room with our friends at Spamhaus, from 6-9 […]

What are our predictions for email marketing and deliverability in 2020?

Welcome back, friends. Happy to see you all again, this time in a brand new DECADE! We’ve been providing email analytics and advanced deliverability insight for quite some time now, but there’s nothing like the feeling of knowing we’re starting a new decade at the top of our game. But there is no rest for […]

You’re not seeing things. Gmail’s email filtering is a bit off lately.

Since the start of the new year, you may have noticed Gmail delivering emails to locations you’re not expecting. For instance, emails from mom in your promotions tab instead of the primary tab, your bank statement in the primary tab instead of updates, and so on. We’ve been contacted by several marketers asking if we’ve […]




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