A.4 Message Transfer Agent Port Numbers

Protocol

Default Port Number

TCP/UDP

TLS Available?

Description

MTP

7100

TCP

Yes

Message Transfer Protocol

Communication between the MTA and the POA

HTTP

7180

TCP

Yes

Hypertext Transfer Protocol

MTA console

Using the MTA Console

SNMP

161

TCP/UDP

No

Simple Network Management Protocol

Communication between the MTA and an SNMP management console

Using an SNMP Management Console