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Q0712
Nigel Metheringham edited this page Nov 29, 2012
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I've hacked sendmail to make an ioctl call at the time of the SMTP RCPT command, to check if a user has exceeded their email quota. If they have I issue a temporary failure and a message - can I do this with Exim?
If you can make this happen in Perl you can use the embedded Perl
facility, and use it from a condition condition in an ACL statement.
You can also use the expansion facility to run an external program, but
this uses more resources because it uses another process.
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