Here's the output of sudo netstat -tap
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 localhost:mysql *:* LISTEN 7856/mysqld
tcp 0 0 *:www *:* LISTEN 9585/apache2
tcp 0 0 <FQDN> *:* LISTEN 7318/named
tcp 0 0 localhost:domain *:* LISTEN 7318/named
tcp 0 0 *:smtp *:* LISTEN 11732/master
tcp 0 0 localhost:953 *:* LISTEN 7318/named
tcp 0 0 *:https *:* LISTEN 9585/apache2
tcp6 0 0 [::]:imaps [::]:* LISTEN 9181/couriertcpd
tcp6 0 0 [::]
op3s [::]:* LISTEN 9088/couriertcpd
tcp6 0 0 [::]
op3 [::]:* LISTEN 9023/couriertcpd
tcp6 0 0 [::]:imap2 [::]:* LISTEN 9124/couriertcpd
tcp6 0 0 [::]:ftp [::]:* LISTEN 11019/proftpd: (acc
tcp6 0 0 [::]:domain [::]:* LISTEN 7318/named
tcp6 0 0 [::]:ssh [::]:* LISTEN 3487/sshd
tcp6 0 0 [::]:smtp [::]:* LISTEN 11732/master
tcp6 0 0 ::1%##########:953 [::]:* LISTEN 7318/named
tcp6 0 1200 <FQDN>:ssh ip###############:54923 ESTABLISHED 21688/sshd: ## [
"mail.err" is empty, and "mail.log" loks fine. Saw something in "mail.info", though; what does this mean?
Feb 18 20:26:30 mail imapd: chdir Maildir: No such file or directory
BTW, many thanks, All, for your assistance!
Kevin J