undeliverable message
1Bounce message — A bounce message, or (failed) Delivery Status Notification (DSN) message, aka Non Delivery Report/Receipt (NDR), Non Delivery Notification (NDN), or simply a bounce is an automated electronic mail message from a mail system informing the sender… …
2Internet Control Message Protocol — Abbreviated ICMP. An error reporting protocol that works with Internet Protocol (IP) and provides the functions used for networklayer management and control. Routers send ICMP messages to respond to undeliverable datagrams by placing an ICMP… …
3Catch-all (Mail) — A Catch all for email, usually refers to a mailbox on a domain that will catch all of the emails addressed to the domain that do not exist in the mail server. Configuring a catch all address can help avoid losing emails due to misspelling.For… …
4Non delivery report — In the Internet s standard e mail protocol SMTP, a bounce message, also called a Non Delivery Report/Receipt (NDR), a (failed) Delivery Status Notification (DSN) message, a Non Delivery Notification (NDN) or simply a bounce, is an automated… …
5Variable envelope return path — (VERP) is a technique used by some electronic mailing list software to enable automatic detection and removal of undeliverable e mail addresses. It works by using a different return path (also called envelope sender ) for each recipient of a… …
6Email spam — An email box folder filled with spam messages. Email spam, also known as junk email or unsolicited bulk email (UBE), is a subset of spam that involves nearly identical messages sent to numerous recipients by email. Definitions of spam usually… …
7E-mail spam — E mail spam, also known as bulk e mail or junk e mail, is a subset of spam that involves nearly identical messages sent to numerous recipients by e mail. A common synonym for spam is unsolicited bulk e mail (UBE). Definitions of spam usually… …
8Dead letter mail — Dead letter redirects here. For other uses, see Dead letter (disambiguation). Dead letter mail or undeliverable mail is mail that cannot be delivered to the addressee or returned to the sender. This is usually due to lack of compliance with… …
9United States Postal Service — This article is about the government agency. For individual post offices, see U.S. Post Office (disambiguation). For the cycling team, see Discovery Channel Pro Cycling Team. USPS redirects here. For the non profit boating safety and education… …
10Backscatter (email) — Backscatter (also known as outscatter, misdirected bounces, blowback or collateral spam) is incorrect automated bounce messages sent by mail servers, typically as a side effect of incoming spam. Recipients of such messages see them as a form of… …
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