Hey there Got a bit of problem on my server when trying to send mail using roundcube webmail. I get this error: Code: SMTP Error (530): Failed to set sender "[email protected]" (5.7.0 Must issue a STARTTLS command first). I have tried some of the solutions I have come across, changing the value of smtp_server in the roundcube config to 'localhost', 'tls://domain.com', 'tls://hostname.domain.com' and still nothing going. Any help would be much appreciated.