MTA list with order is defined at index() method in this module
MSP list with order is defined at index() method in this module
Call Sisimai::MTA and Sisimai::MSP for getting module list
Add test code for index() method
Increment version number of the module
Increment version number of the module
Add MTA/X1.pm into the module list
MTA module for unknown MTA #1
Test code for Sisimai::MTA::X1
Sample email for Sisimai::MTA::X1
Update table
Update README.md