i have been using mailinabox on a vps server and all the major email tests say the mailbox is fine. only gmail treats my emails as spam. others just work fine.

i have been using mailinabox on a vps server and all the major email tests say the mailbox is fine. only gmail treats my emails as spam. others just work fine. i don't know what to do other than having to call receipients and ask them to unspam the mail. That doesnt seem to "train" their spam filters so don't know