Structure of identities
email_addr
text
NOT NULL
the email address that will appear in the From header field and enveloppe From of outgoing messages when this identity is choosen.
usernametext
The optional full name of the account. This is typically the first and last name for a personal account, but can be anything that suits the user. If not empty, it will appear next to the email address in the From header field of outgoing messages.
xfacetext
An optional string to push into an X-Face header in outgoing mail. This is an text-encoded representation of a black and white 48x48 picture, typically of the sender's face. An Online X-Face Converter can help creating X-Face strings from a digitized picture. X-Faces are displayed by some mail programs such as Sylpheed, VM (emacs-based), XFMail.
signaturetext
An optional piece of text that will be appended at composition time to the body of outgoing messages.