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Chapter 7 Ongoing System Management 13 9
IMAP and POP
Dovecot, the IMAP and POP service, loads the fully-qualied domain name at startup
and conguration reload. After a change, Dovecot must be restarted or given a SIGHUP
command, at a minimum).
You must also restart if you manually edited the listen or ssl_listen parameters.
SMTP
Postx, the SMTP service, is very sensitive to network address and identity changes.
The information it stores about the DNS name, the IP address, and network interfaces
is only loaded once at service startup. To resume service after a change to the DNS
name or the IP address, you must fully stop the service, and restart it.
You must also restart it if you manually edited the inet_interfaces, inet_protocols,
smtp_bind_address, myhostname, or mydomain conguration parameters.
Mailing List
Mailman, the mailing list service, tracks the incoming and outgoing mail hosts by
reading them on startup. If you change the hostname or IP address, restart Mailman
for it to honor the conguration changes.
Antivirus and Antispam
ClamAV, the antivirus service, gets its listening address at startup as well. After making
any changes to the DNS name or IP address, you must stop and restart to resume
service.
SpamAssassin, the anti-spam service, gets its conguration information at startup and
can reload conguration data while running. To load new conguration data, restart
SpamAssassin or give it a SIGHUP command, at a minimum.
Certicates for Mail Services
Mail servers that use SSL need new certicates. You might need to regenerate or
repurchase the certicates. Use Server Admin to import the certicates, then congure
each service’s new certicate.
Understanding IP Address or Network Identity Changes on
Collaboration Services
Collaboration services provide tools to coordinate people and time. Collaboration
services include:
Calendar service Â
Address Book service Â
iChat service Â
Certicates for collaboration services Â