What tools do you use to monitor deliverability? My full monitoring stack
revmetrics9 · RevMetrics · 2026-01-10 · 1,780 views
I manage 80 PuzzleInbox inboxes for my agency. Here is my full cold email deliverability monitoring stack.
GlockApps: Inbox placement testing. Run before every campaign and weekly during active sends. $60/month.
MXToolbox: Blacklist monitoring for all sending domains. Free tier works for basic checks. Pro for continuous monitoring.
PuzzleInbox spam checker: Quick DNS verification — SPF, DKIM, DMARC pass/fail checks.
Google Postmaster Tools: Domain reputation, spam rate, IP reputation for Gmail delivery. Free.
Microsoft SNDS: Similar to Postmaster Tools but for Outlook/Microsoft delivery. Free.
Total monitoring cost: about $80/month. This stack catches 95% of deliverability issues before they become serious. The ROI on monitoring is enormous — catching a blacklisting or DNS misconfiguration early saves you from burning entire domain sets.
Comments (3)
growthguy · 2026-01-11
$80/month for monitoring 80 inboxes is extremely reasonable. one caught blacklisting pays for itself for years. I use a similar stack minus Microsoft SNDS — should probably add that
tina_infra · 2026-01-11
Google Postmaster Tools being free is insane. it literally tells you exactly how Google views your domain reputation and most people don't even set it up. criminal
bouncebetty · 2026-01-12
do the built-in spam checkers from inbox providers replace any of these tools or are they more of a quick spot check? wondering if I still need MXToolbox on top of my provider's tools