| Attribute | Must | Description | 
|---|---|---|
| Association-Lifetime | X.400 - Number of seconds an association is idle before it is removed (60) | |
| Gateway-Local-Cred | X.400 - Password the remote MTA must use when establishing a connection | |
| Gateway-Local-Desig | X.400 - Password the remote MTA must use when establishing a connection | |
| Local-Initial-Turn | Specifies if the initial turn on the association is local | |
| MTA-Local-Cred | X.400 - Override Password for the Local MTA | |
| MTA-Local-Desig | X.400 - Override Name for the Local MTA | |
| N-Address | X.400 - The N-Address portion of this Gateway's Presentation Address | |
| N-Address-Type | X.400 - If not specified, defaults to Network Address | |
| Num-Of-Open-Retries | X.400 - Number of times the MTA tries to establish a remote connection (20) | |
| Num-Of-Transfer-Retries | X.400 - Number of times the MTA tries to resend a block of data (20) | |
| Open-Retry-Interval | X.400 - Number of seconds the MTA will wait before trying to re-connect (60) | |
| P-Selector | X.400 - The P-Selector portion of this Gateway's Presentation Address | |
| P-Selector-Inbound | ||
| RTS-Checkpoint-Size | X.400 - Size of data in K that is transfered in a block (1-4) | |
| RTS-Recovery-Timeout | X.400 - Max number of seconds before aborting recovery of a connection (10) | |
| RTS-Window-Size | X.400 - Number of Checkpoints sent before an ACK is expected | |
| S-Selector | X.400 - The S-Selector portion of this Gateway's Presentation Address | |
| S-Selector-Inbound | ||
| Session-Disconnect-Timer | X.400 - Number of seconds the MTA waits for an ACK after a session disconnect | |
| Supporting-Stack | DN of the associated stack | |
| T-Selector | X.400 - The T-Selector portion of this Gateway's Presentation Address | |
| T-Selector-Inbound | ||
| Temp-Assoc-Threshold | When the queued messages reaches this value, another association is started | |
| Transport-Expedited-Data | X.400 - Used only if supported on the other end of the connection | |
| Turn-Request-Threshold | Specifies how many comms can occur after request but before it's granted | |
| Two-Way-Alternate-Facility | Specifies if the inter-MTA association is to be two way alternate | |
| X400-Attachment-Type | Bodypart type to use for encoding attachments when sending to X.400 world | |
| X400-Selector-Syntax | Specifies the syntax of the P, S, & T selecters (0 or undefined=Hex, 1=Text) |