Computer system and method for adding attributes to an electronic message on behalf of the messages sender

A computer system comprising at least one non-transitory computer-readable medium having stored thereon computer program instructions executable by at least one computer processor to perform a method, the method comprising:

• (A) receiving, via a first medium, an original message created by a message creator, wherein the message encodes first message information and message recipient data representing an identity of the message recipient, wherein receiving the original message comprises receiving the original message over a network via a first communication protocol;
• (B) receiving attribute input from the message recipient;
• (C) producing a modified message, within a software application and without using the first communication protocol, based on the original message and the attribute input;
• (D) prompting the message creator to accept or reject the modified message;
• and
• (E) receiving input from the message creator indicating one of acceptance and rejection
• of the modified message.