Free tool
What does this bounce mean?
Paste the bounce message, or just the error line, and get a plain-English explanation: who rejected it, why, whether it's permanent, and what to do next. Covers Gmail, Microsoft, Yahoo, iCloud, the big filters and common provider messages.
Runs entirely in your browser. Nothing you paste leaves your machine.
Result
What to do
Providers reword their errors from time to time. If the explanation doesn't fit what you're seeing, send me the bounce and I'll add it.
Bouncing and not sure why?
Blocklistings and reputation problems rarely fix themselves. Book a free 20-minute review and I'll tell you what to do first. If you're already in trouble, the Spam Rescue starts within a week.