The IMAP4 and POP3 screens are almost identical, organizing the different
configuration settings into the following 2 categories and tabs:
Enable
service at port: Whether you want the service enabled and what port
number you want it to listen to (Default is on, with IMAP4 port 143
and POP3 port 110).
Use
seperate port for IMAP over SSL (IMAP4 only): Whether you want IMAP4/SSL
connections to switch to a seperate port, and the port number you want
to use (Default is off, and port number 993).
Allow
anonymous login (IMAP4 only): Whether you want to enable anonymous
login (Default is off).
Allow
password login: Sets user password login with optional encryption (Default
is on, minimum cipher length 0).
Maximum
network connections per process: The maximum number of client connections
per process (Default is 4000 for IMAP4 and 600 for POP3).
Drop
client if idle for: Amount of idle time allowed in the client connection
before the connection is dropped (Default is 30 minutes for IMAP4 and
10 minutes for POP3).
Maximum
number of threads per process: How many threads can run on any single
process (Default is 1000).
Number
of processes: How many processes you want to spawn for the service
(Default
is 1).
Service
Banner: The message you want the service to send to clients when they
first connect.