Take a look to this post.
If you want to view the headers for queued message (I’ll use 1t2bK4-008Wy2-KM as example):
exim4 -Mvh 1t2bK4-008Wy2-KM
To view the body:
exim4 -Mvb 1t2bK4-008Wy2-KM
Check if all your mail domains have a admin user or alias:
grep -ri admin /home/*/conf/mail/*/{aliases,accounts}
1 Like