IBM i Access Host Servers - WRKREGINF - QIBM_QZ*

Hi everyone,  I have another question about the iSeries install guide:

 The user profile you specify during the Platform Pack install must not be limited by network security. Most of the Platform Pack install is done through commands and JAVA code that uses TCP\IP to send work between various OS\400 service jobs. To find out whether there are network security limitations in place:

1.Enter the WRKREGINF command.

2.Page down to the QIBM_QZ* entries which are for the IBM i Access Host Servers.

3.Use Option 8 on any of these to see if an exit program is in place.

So I did that, and I found some exit programs in place.  I can just remove them, but I'm not sure if I should.  The guide says to check all QIBM_QZ* entries, and I did, but the only ones that had an exit program in place where QIBM_QZMFMSF_*, and all have a text description that starts with MSF.  Does anyone know what these MSF entries are?  They have descriptions that seem to indicate it has something to do with sending mail from the iSeries.  For example, "Attachment management", "Envelope Processing', and "Address resolution".  Does anyone know if I can ignore