Software >> OS >> Unix >> sendmail >> What are the file types and their naming conventions

The files in clientmqueue and mqueue are named with the following namin convention

first letter =  type and status

second letter = "f"

rest is the sendmail queue ID that you see in the logs and mailq output.

The first letter is usually one of :

d : the body of the mail

q : routing information and headers when the message is normal

Q : rename of the "q" file when the message is abandoned for some reason

h : rename of the "q" file when the message is held (quarantined by a milter)

t : temporary file

x : transcript of delivery attempts