通过PHP访问Linux服务器上的邮件队列

Question

I wonder if someone can help with a query I have. My server recently had an email account hacked and subsequently a large amount of spam appear in the mail queue. I've changed the password on the email account in question and used qmHandle to remove the spam from the mail queue. I would like to prevent this from happening again and I was wondering if it would be possible for PHP to access the mail queue and run a cron job that could run every hour and run a script to alert me if the mail queue exceeds a set amount of mails so I could be alerted and react accordingly? My server is Linux running Redhat if that makes any difference?

Many thank in advance.

Answer 1

As i don't know which Maildaemon you use, i can just throw some things to think about:

1. To display the que, use "mailq" (on a Debian/Postfix system)
2. To access it from php, use "sudo" (execute a command as root from non priviledged user)
3. Maybe filter/group it by adding "grep" to "mailq"

Answer 2

Since you are using qmail, and you have qmHandle on the server, it's fairly straight-forward. qmHandle -s will give you some statistics, including the number of messages in the remote queue. The remote queue contains outgoing messages that are queued for delivery. You can cobble together a one-liner using grep and cut, which will give you just the count of the number of messages in the remote queue, like so: qmHandle -s | grep remote | cut -d: -f2 qmHandle -s | grep remote | cut -d: -f2

Answer 3

you don't need PHP to do that. A simple bash script ran by cron would do it. Somethig like that:

 nbline=`mailq|wc -l` if [ $nbline -gt $seuilMails ] then echo -e "\\nSeuil queue postfix dépassé ($nbline lignes)" >> $msgFile sendmail=true else echo -e "\\nQueue postfix normale" >> $msgFile fi if [ "$sendMail" == true ]; then mailto_admins "$sujet" "$msgFile" fi