I'm running 5.0.11 on Ubuntu 6.06 64bit. I have several domains on the server that send and receive email perfectly. However, all email I send to Yahoo gets delivered to their spam folder. After hours of google searching I think it's because I'm hosting multiple domains on zimbra, all of which send from one IP.

my mail server is mail.snapshotit.com and one of my domains is cfcpartners.com. The dns is setup correctly, spf is correct, reverse dns is correct. I've run the dnsstuff.com report many times and everything appears to be correct. I'm pulling my hair out over this....

Can other people send email to yahoo on a zimbra server that hosts multiple domains? If so, did you do anything special to DNS or the server to get email through???