I have an issue with Google. (GMail to be exact)
About 1 month ago, we had a security breach, and mail was relayed through our servers. we got listed in almost ALL Black-Lists :(
we fixed the problem, and requested removal from Black-lists, which was granted easily.
currently (over 3 weeks), we are not sending any spam anymore.
furthermore, we got clear from all the Black-lists (MxToolBox Black-List Search Result)
But, GMail still refuse to get Anything from the server, stating '550 Spam'.
Following, Telnet attempt to send to gmail:
220 mx.google.com ESMTP g47si45436208eep.123 helo megatec.co.il 250 mx.google.com at your service mail from: <email@example.com> 250 2.1.0 OK g47si45436208eep.123 rcpt to: <firstname.lastname@example.org> 250 2.1.5 OK g47si45436208eep.123 Data 354 Go ahead g47si45436208eep.123 Test123 . 550-5.7.1 [18.104.22.168 11] Our system has detected that this message is 550-5.7.1 likely unsolicited mail. To reduce the amount of spam sent to Gmail, 550-5.7.1 this message has been blocked. Please visit 550-5.7.1 http://support.google.com/mail/bin/answer.py?hl=en&answer=188131 for 550 5.7.1 more information. g47si45436208eep.123 Connection to host lost.
i tried filling the form @ Gmail - Report Delivery Problem
i also tried reaching Google by phone, but the message was to go to the Link mentioned above.
I Checked ReverseDNS and is ok...
We dont have TLS, but that shouldn't be a problem, shouldn't it?
Note: we are not a Bulk sender.
Anyone has an idea? what can be blocking our IP?
Anyone know whom can be contacted in order to resolve this BL listing?
EDIT: Added SPF Record to our domain few Days Ago... Still NO GO :(