| Attribute | Must | Description |
|---|---|---|
| Common-Name | X | X.500 Common Name (DN of this object) |
| Deliv-Cont-Length | Maximum message size in K bytes. (0 = 0K bytes, Absent = No limit) | |
| Deliv-EITs | EITs supported by the MTA | |
| Deliv-Ext-Cont-Types | Deliverable External Content Types - For X.400 conversion | |
| Diagnostic-reg-key | Registry Key where the diagnostic key/values are keptlog keys/values live | |
| Expand-DLs-Locally | An indication to the MTA if it should expand DLs in the origination domain | |
| MTA-Local-Cred | X.400 - Password the remote MTA must use when establishing a connection | |
| MTA-Local-Desig | X | X.400 - MTA name |
| Trans-Retry-Mins | X | Retry interval for connecting to other MTAs |
| Trans-Timeout-Mins | X | timeout interval for connecting to other MTAs |