V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

MTA
       Mail Transport Agent (SMTP)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

MTA
       Main Table Area (CD-MRW)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

MTA
       Message Transfer Agent (MTS, OSI, X.400)


The Free On-line Dictionary of Computing (30 December 2018):

MTA

   1.  Message Transfer Agent.

   2.  Message Transfer Architecture. (AT&T).

   3. Multiple Terminal Access.

   4. Maintenance Task Analysis.

   (1997-02-28)


The Free On-line Dictionary of Computing (30 December 2018):

MTA

        Mail Transfer Agent.