> the idea of having Apache/PHP invoking Postfix directly as an executable (i.e., not via SMTP/ whatever) makes me feel nervous. I don't know much about roundc

> the idea of having Apache/PHP invoking Postfix directly as an executable (i.e., not via SMTP/ whatever) makes me feel nervous. I don't know much about roundcube, but afaik it works by talking to your SMTP/IMAP servers.