Send mail command in linux

As a Linux administrator responsible for email infrastructure, having robust logging and monitoring is crucial.

Linux sendmail configuration

The Sendmail mail transfer agent (MTA) produces detailed event and performance data that provides visibility into mail traffic, security threats, delivery issues and more.

This 3500+ word guide will help you leverage Sendmail logs to their full potential – from storage and parsing to advanced analysis techniques for troubleshooting.

An Overview of Sendmail Logging

Sendmail uses syslog to log all mail server activity.

These logs contain valuable data points like:

1. Message metadata – sender, recipient, message IDs, timestamps, sizes, etc
2. Processing events – message received, delivery attempts, temporary deferrals
3. Permanent failures – delivery timeout, host unreachable
4. Security alerts – detected viruses, blacklisted sender, spam pattern match
5. Performance metrics – queue length, volume delivered/deferred, host responsiveness
6. Resource monitoring – memory, CPU usage percentages

Granular visibility into these m

check sendmail log file

how to check sendmail logs in unix