| Name | Size | Description |
|---|---|---|
| mid | 0 | message identifier |
| modem | 0 | modem |
| msrp | 0 | Message Session Relay Protocol |
| msrps | 0 | Message Session Relay Protocol Secure |
| mtqp | 0 | Message Tracking Query Protocol |
| mupdate | 0 | Mailbox Update (MUPDATE) Protocol |
| news | 0 | USENET news |
| nfs | 0 | network file system protocol |
| nntp | 0 | USENET news using NNTP access |
| opaquelocktoken | 0 | opaquelocktokent |
