The letters “MTA” at the end of a file name, such as “strtupxx.mta,” commonly stand for “Message Transfer Agent.” The MTA file extension indicates a file associated with a system that distributes messages to various destinations from a server, such as Microsoft Exchange Server, Sendmail and Qmail. However, the MTA file extension is used by more than one application, and some viruses and spyware also use this extension. Writer Bio
