One of our clients got blacklisted week ago and most of their emails from their exchange server started bouncing as a result. I had comcast create reverse dns for mail.theirdominname.com to their IP address and created a SPF text record on their godaddy domain.
This helped me get them delisted and for a week we started making progress with ability to send to most domains, howerver yesterday they got blacklisted by lash back with "Sender has sent to LashBack Unsubscribe Probe accounts
Return codes were: 127.0.0.2"
I checked their mail server on mxtoolbox and there is no relay, and everything looks good.
What else can be causing them to get listed again? I am running out of ideas and would appreciate any help
Thanks in advance