Possible enumeration values:
| Name | Value | Description |
|---|---|---|
| HARD_BOUNCE |
1 |
|
| TRANSIENT |
2 |
|
| UNSUBSCRIBE |
16 |
|
| SUBSCRIBE |
32 |
|
| AUTO_RESPONDER |
64 |
|
| ADDRESS_CHANGE |
128 |
|
| DNS_ERROR |
256 |
|
| SPAM_NOTIFICATION |
512 |
|
| OPEN_RELAY_TEST |
1024 |
|
| UNKNOWN |
2048 |
|
| SOFT_BOUNCE |
4096 |
|
| VIRUS_NOTIFICATION |
8192 |
|
| CHALLENGE_VERIFICATION |
16384 |