Its status, its log files, how to setup and remove it, the SMTP use, the possible issues :
Sendmail status :
Sendmail log :
Setup and remove :
Sendmail and SMTP :
– Port 25 already in use (after the installation of Exim4, it can be sendmail or postfix).
– Sendmail keeps running.
– Setting the unprivileged uid to 0 is not recommended.
– Sendmail still using port 25.