New1 November 2026

See when an email didn’t arrive

When a mail server sends your email back, SiteBirdy shows it on that email, says why in plain words, and helps you send it again.

If an email can’t be delivered, a mail server sends a report back. SiteBirdy now matches that report to the email you sent: it shows Not delivered on that email and in Sent, or Delayed while your mail server is still trying, and explains why. Choose Edit and send again to fix it. You get a notice as soon as the report reaches your inbox, even when one of your rules files it away, and for a while after you send, SiteBirdy also looks for reports in Junk and Trash. While you write, SiteBirdy warns about attachments Gmail refuses. Reports about mail you never sent go to Junk by themselves.

Where to find it
Sent → an email you sent
About this featureMail that didn’t arrive

Ready to start?

Sign in with your SiteBirdy account, or create one and add the mailboxes you already have.

SiteBirdy is also an app for Mac and Windows