The level of logging can be set for sendmail. The default using a standard configuration table is level 9. The levels are as follows:
| 0 |
No logging |
| 1 |
Serious system failures and potential security problems |
| 2 |
Lost communications (network problems) and protocol failures |
| 3 |
Other serious failures |
| 4 |
Minor failures |
| 5 |
Message collection statistics |
| 6 |
Creation of error messages, VRFY and EXPN commands |
| 7 |
Delivery failures (host or user unknown, etc.) |
| 8 |
Successful deliveries and alias database rebuilds |
| 9 |
Messages being deferred (due to a host being down, etc.) |
| 10 |
Database expansion (alias, forward, and userdb lookups) |
| 20 |
Logs attempts to run locked queue files. These are not errors, but can be useful to note if your queue appears to be clogged |
| 30 |
Lost locks (only if using lockf instead of flock) |
See also: http://help.hardhathosting.com/question.php/203
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