4 ms·

RFC 5233 - https://tools.ietf.org/html/rfc5233 https://tools.ietf.org/html/rfc5233

• TimWolla 11y ago
  > Subaddressing is the practice of augmenting the local-part of an > [RFC2822] address with some 'detail' information in order to give > some extra meaning to that address. One common way of encoding > 'detail' information into the local-part is to add a 'separator > character sequence', such as "+", to form a boundary between the ^^^^^^^^^^^ > 'user' (original local-part) and 'detail' sub-parts of the address, > much like the "@" character forms the boundary between the local-part > and domain. (Highlighting by me) The RFC even gives an example using the hash: > o A message addressed to "5551212#123@example.com" is delivered to the voice mailbox number "123" at phone number "5551212".