check box "enable/disable SMTP"
It would be nice to have a check box to enable or disable SMTP for a mailbox account. The feature exists for POP/IMAP but not for SMTP.
With this feature, it would be easy to block instantly a compromised account which send Spam.
As well, this feature could be extended to enable/disable SMTP at the domain level (for example non paying customer).
Please vote for this feature if you'd like to see it in ISPconfig.