A “delivery failed” message tells you why an email didn't arrive. How to read it and what to do next.
When an email can't be delivered, you get a message back, often titled Undeliverable or Delivery has failed. It's called a non-delivery report, and it usually says why.
Common reasons, and what to do
- Address not found. Check the spelling. An old autocomplete suggestion is a common cause.
- Mailbox full. The other person's mailbox is full. Try again later, or contact them another way.
- Message too large. Send a OneDrive or SharePoint link instead of the attachment.
- Rejected or blocked. The other organization's email filter didn't accept it. Send us the bounce message.
What to send us
- Forward the whole bounce message to support@deepnet.com. The technical details at the bottom help us find the cause.
- Tell us whether it happens with one person, one company or everyone.
Got a bounce for an email you never sent? Don't open any attachment in it, and call us on 707-755-8000. Someone may be sending email that pretends to come from you.
