Identifies the sender's user account for a piece of received mail. Note that this method does not validate that the sender is who they say they are, just that they've presented some credential which corresponds to a recognizable user.

Determine if two inbound email addresses are effectively identical. This method strips and normalizes addresses so that equivalent variations are correctly detected as identical. For example, these addresses are all considered to match one another:

"Abraham Lincoln" <alincoln@example.com>
alincoln@example.com
<ALincoln@example.com>
"Abraham" <phabricator+ALINCOLN@EXAMPLE.COM> # With configured prefix.

Strip a global mailbox prefix from an address if it is present. Phabricator can be configured to prepend a prefix to all reply addresses, which can make forwarding rules easier to write. A prefix looks like:

example@phabricator.example.com # No Prefix phabricator+example@phabricator.example.com # Prefix "phabricator"

Reduce an email address to its canonical form. For example, an address like:

"Abraham Lincoln" < ALincoln@example.com >

...will be reduced to:

alincoln@example.com

Return a regular expression fragment which matches the name of an object which can receive mail. For example, Differential uses:

D[1-9]\d*

...to match D123, etc., identifying Differential Revisions.

Load the object receiving mail, based on an identifying pattern. Normally this pattern is some sort of object ID.