Thanks for the advice - it sounds like we have the same issue
I made a few changes to my main.inc.php file
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// the mail host chosen to perform the log-in
// leave blank to show a textbox at login, give a list of hosts
// to display a pulldown menu or set one host as string.
// To use SSL/TLS connection, enter hostname with prefix ssl:// or tls://
$rcmail_config['default_host'] = 'home.homeserver.com';
// use this host for sending mails.
// to use SSL connection, set ssl://smtp.host.com
// if left blank, the PHP mail() function is used
// Use %h variable as replacement for user's IMAP hostname
$rcmail_config['smtp_server'] = 'home.homeserver.com';
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now when I log in and try to send an email I get the following error:
Roundcube error : "smtp error 550 failed to add recipient,"
and hmailserver is giving me the following error:
Hmailserver error: Sent:530 SMTP authentication is required.
I've tried using the ssl:// but that wont let me log into webmail client.
to get SSL:// to work do I need to open up more ports?
it's progress - I believe your idea solved the malformed issue - now I just need to figure out the authentication problem.