Some useful postfix commands
//postqueue -p is the same as mailq
List mail queue and MAIL_ID's, list mail queue
postqueue -p
mailq
Reload config
service postfix reload
Restart postfix server
service postfix restart
View the postfix version
postconf mail_version
Show default postfix values
postconf -d
Show non default postfix values
postconf -n
Flush mail queue
postfix flush
Process the queue now
postqueue -f
Process all emails stuck in the queue
postsuper -r ALL && postqueue -f
Read email from mail queue
postcat -q MAIL_ID
To remove MAIL_ID mail from the queue
postsuper -d MAIL_ID
To remove all mail from the queue
postsuper -d ALL
To remove all from mail queue FAST
find /var/spool/postfix/deferred/ -type f | xargs -n1 basename | xargs -n1 postsuper -d
To remove all mails in the deferred queue
postsuper -d ALL deferred
Sort and count emails by "from address"
postqueue -p | awk '/^[0-9,A-F]/ {print $7}' | sort | uniq -c | sort -n
Removing all emails sent by: mailto:user@adminlogs.info
postqueue -p|grep '^[A-Z0-9]'|grep user@adminlogs.info|cut -f1 -d' '|tr -d \*|postsuper -d -
Remove all email sent from user@admin.info
postqueue -p|awk '/^[0-9,A-F].*user@admin.info / {print $1}'|cut -d '!' -f 1|postsuper -d -
Remove all email sent by domain adminlogs.info
postqueue -p | grep '^[A-Z0-9]'|grep @adminlogs.info|cut -f1 -d' ' |tr -d \*|postsuper -d -
Mail queue stats short
postqueue -p | tail -n 1
Number of emails in Mail queue
postqueue -p | grep -c "^[A-Z0-9]"
Fast count of emails in mail queue
find /var/spool/postfix/deferred -type f | wc -l
Watch Log Live
tail -f /var/log/maillog
Count and sort success pop3/imap logins
grep "\-login" /var/log/dovecot-info.log |grep "Login:"|awk {'print $7'}|sort|uniq -c|sort -n
Count and sort success SMTP postfix logins (useful for tracking spammer)
grep -i "sasl_username" /var/log/maillog |awk {'print $9'}|sort|uniq -c|sort -n
Count and sort success SMTP postfix logins on exact date "Jun 18"
grep -i "sasl_username" /var/log/maillog |grep "Jun 18"|awk {'print $9'}|sort|uniq -c|sort -n
Analyze Postfix Logs
pflogsumm /var/log/maillog | less
** If you don't have pflogsumm then you can install this rpm package "postfix-perl-scripts".