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Email forwarding
Email forwarding generically refers to the operation of re-sending a previously delivered email to an email address to one or more different email addresses.
The term forwarding, used for mail since long before electronic communications, has no specific technical meaning, but it implies that the email has been moved "forward" to a new destination.
Email forwarding can also redirect mail going to a certain address and send it to one or more other addresses. Vice versa, email items going to several different addresses can converge via forwarding to end up in a single address in-box.[clarification needed]
Email users and administrators of email systems use the same term when speaking of both server-based and client-based forwarding.
The domain name (the part appearing to the right of @ in an email address) defines the target server(s) for the corresponding class of addresses. A domain may also define backup servers; they have no mailboxes and forward messages without changing any part of their envelopes. By contrast, primary servers can deliver a message to a user's mailbox and/or forward it by changing some envelope addresses. ~/.forward files (see below) provide a typical example of server-based forwarding to different recipients.
Email administrators sometimes use the term redirection as a synonym for server-based email-forwarding to different recipients. Protocol engineers sometimes use the term Mediator to refer to a forwarding server.
Because of spam, it is becoming increasingly difficult to reliably forward mail across different domains, and some recommend avoiding it if at all possible.
Plain message-forwarding changes the envelope recipient(s) and leaves the envelope sender field untouched. The "envelope sender" field does not equate to the From header which Email client software usually displays: it represents a field used in the early stages of the SMTP protocol, and subsequently saved as the Return-Path header. This field holds the address to which mail-systems must send bounce messages — reporting delivery-failure (or success) — if any.
Hub AI
Email forwarding AI simulator
(@Email forwarding_simulator)
Email forwarding
Email forwarding generically refers to the operation of re-sending a previously delivered email to an email address to one or more different email addresses.
The term forwarding, used for mail since long before electronic communications, has no specific technical meaning, but it implies that the email has been moved "forward" to a new destination.
Email forwarding can also redirect mail going to a certain address and send it to one or more other addresses. Vice versa, email items going to several different addresses can converge via forwarding to end up in a single address in-box.[clarification needed]
Email users and administrators of email systems use the same term when speaking of both server-based and client-based forwarding.
The domain name (the part appearing to the right of @ in an email address) defines the target server(s) for the corresponding class of addresses. A domain may also define backup servers; they have no mailboxes and forward messages without changing any part of their envelopes. By contrast, primary servers can deliver a message to a user's mailbox and/or forward it by changing some envelope addresses. ~/.forward files (see below) provide a typical example of server-based forwarding to different recipients.
Email administrators sometimes use the term redirection as a synonym for server-based email-forwarding to different recipients. Protocol engineers sometimes use the term Mediator to refer to a forwarding server.
Because of spam, it is becoming increasingly difficult to reliably forward mail across different domains, and some recommend avoiding it if at all possible.
Plain message-forwarding changes the envelope recipient(s) and leaves the envelope sender field untouched. The "envelope sender" field does not equate to the From header which Email client software usually displays: it represents a field used in the early stages of the SMTP protocol, and subsequently saved as the Return-Path header. This field holds the address to which mail-systems must send bounce messages — reporting delivery-failure (or success) — if any.