mail marked as spam when using roundcube

[el_betillo]

Hi everybody !!

I have a hostmonster(dot)com hosting so I can manage mi domains in there, I installed Roundcubemail  for some of this domains in order to get webmail service.

The problem is when the users sent an email to sites like yahoo or to another domain in my hostmonster account they`re always sent to the spam folder. I already configured the settings in the main.inc file (defined the user password and port to send the email).
BTW if I configure any account in outllook the mail is not marked as spam.

So is there some reazon of why this could happen ?

Thanks for your help and best regards

Betillo

[MKelma]

do send both (outlook & RC) through the same MTA?
also, to dig this up, the spamreport of a sample message would be useful...