Are your IP address is SPAM IP?
My friend have send me an Email few month back… The email is drop in to SPAM list~ Every email he send me has drop into spam section.
According to his IT personnel, once of their PC get a virus and send out thousand to million of spam email out to the world. That why their Company IP address are listed in the Spam Blocking List. All the email send out from their company consider spam, so that their client can’t receive their email accordingly.
To prevent this happen to you, you may check on your IP whether in the spam list, just visit SpamHaus. Put your IP address and check…
If you would like to check your IP, you may get your public IP address here