VERIFIED SOLUTION i

Populating the Mail.dat Field Code SEG-1151 "Bypass Seamless Acceptance" in MailStream Plus

MailStream Plus™, all versions, all platforms
To make the Mail.dat files generated by MailStream Plus™ populate Mail.dat Field Code SEG-1151 "Bypass Seamless Acceptance" use an xx INF parameter with subkeyword MDBPSA starting in position 28, and a Y in position 35.
If the whole mailing is to bypass it, you can use an RP INF, like this-

RP INF                     MDBPSA Y
*...+....1....+....2....+....3....+


If you want to indicate only certain entry points or batches are to bypass seamless acceptance, you can use an EP INF or BATINF instead of RP INF.

For additional information on MDBPSA, and xx INF parameters,  please refer to the MailStream Plus Guide.
UPDATED:  May 15, 2019