Considered UNSOLICITED BULK EMAIL, apparently from

I had the identical problem in August and reported it on this site.<br> <br> When trying to send email, I receive an automated response from Content-filter at smtp3.vodamail.internal which states that my mail: \was considered unsolicited bulk e-mail (UBE)."<br> <br> I sent ONE email today and hardly use this email address... how can it be considered \""unsolicited bulk e-mail\""??<br> <br> Your internal reference code for your message is 02315-20/NwWJhHTJbI1O<br> <br> Please sort this out as a matter of extreme urgency"