- Plesk for Linux
How to limit the number of emails sent through PHP scripts?
Number of outgoing emails sent by Linux Sendmail utility can be limited as usual emails, however some specificity take place here.
If a user or a script sends an email message by using the Linux Sendmail utility, then Plesk counts this outgoing message for the corresponding domain in case the script is handled by mod_apache ( mod_php , mod_perl , mod_python , and so on). In other cases (CGI, FastCGI), Plesk counts the outgoing message for the corresponding subscription, but does not count it for the corresponding domain.
A script or a user can send messages using Sendmail if the option Allow scripts and users to use Sendmail is switched on at Tools & Settings > Mail Server Settings:
Following articles can be useful:
How to change Outgoing Mail Limits for subscription?
How to set the outgoing mail limit for a single mailbox or domain?