Newsletters Going To Junk But Order Notifications Not

hi settup my host to yandex mail servers, its better than local.

test mails, order statuses, customer notifications vs. going to inbox

but newsletters going to junk

what difference ? how can i fix ?

Probably has to do with the content of the newsletter since the email headers (envelop) would be the same.

where can i change it ?

Could be too many links in the mail or general crap that msn/hotmail etc consider junk warnings