we have a problem with sending emails from domain @macauditor.pl to domains which are hosted on Outlook.com or protected by Microsoft Forefront. Problem occurred after we changed IP address of our mail server. We have set MX, revDNS and SPF records correctly, but still are getting the following NDR:
"550 5.7.1 Service unavailable; Client host [217.67.215.242] blocked using FBLW15; To request removal from this list To request removal from this list please forward this message to delist@messaging.microsoft.com".
I have sent email to "delist@messaging.microsoft.com" but didn't get any response other than this:
"Thank you for your delisting request SRX1244578730ID. Your ticket was received on (Apr 28 2014 11:11 AM UTC) and will be responded to within 24 hours."
It has been nearly 2 days since our first request and we are still unable to send emails to domains: @bbdo.com.pl, @mediadirection.com.pl, @ideatfi.pl, @inventumtfi.pl. Those domains belong to our important clients, so this is a huge problem for us.
We have already checked our IP at http://www.anti-abuse.org/ and it seems that we are 'clean' everywhere. Only MS is blocking our emails.
Kind Regards,
Paweł Gąsieniec