In some embodiments, a method comprises detecting a request to append a signature to an outgoing email, wherein the outgoing email is addressed from a sender to a recipient. A plurality of email signature rules for the sender is accessed. At least one of a condition and a property associated with the outgoing email are evaluated against the plurality of email signature rules. It is determined that at least two of the plurality of email signature rules are satisfied based on evaluating at least one of the condition and the property associated with the outgoing mail against the plurality of email signature rules. A plurality of email signatures is identified from a list of email signatures based, at least in part, on the at least two email signature rules that are satisfied. A composite signature is generated with the plurality of email signatures.