Jonathan Nichols wrote:
But my webmail client use this e-mail address: no-reply@hollozoltan.extra.hu instead of my default e-mail address: hollozoltan@extra.hu
In which configuration file can I modify this settings?
That almost sounds like a MTA issue. Something like sendmail or Postfix.
Yes, I assume the same. You most likely don't have an SMTP server configured in Roundcube and in this case it uses PHP's built in mail() function to send mails.
I recommend to configure 'smtp_server' and other SMTP related properties in Roundcube's config/main.inc.php file in order to make Roundcube talk directly to an SMTP server when sending mails.
~Thomas