How to increase sendmail queue runner check interval
Author's note: this is an older article I brought over from my prior blog by popular request. Some of the information may be a little dated.
By default, sendmail will attempt to process/retry deferred messages in hourly intervals. For most environments, that's usually fine. However, some admins may want sendmail to try more . . .
How to implement max file size limits and "log rotation" with tcpdump
Author's note: this is an older article I brought over from my prior blog by popular request. Some of the information may be a little dated.
Writing this down so I don't forget.
The issue: You need to collect a packet capture for an extended amount of time but don't want it to consume too much disk space.
. . .How to use sendmail debug switches to troubleshoot deferred messages
More information than you ever wanted to know about sendmail debugging
Author's note: this is an older article I brought over from my prior blog by popular request. Some of the information may be a little dated.
The problem: You need to troubleshoot low-level details concerning a deferred message in sendmail but don't want to necessarily increase global log levels (or restart services).
. . .