THE SET UP
Rather than using services such as constant contact, we have set up our own mail marketing solution. I have a static IP address and I also have this white listed with service called return Path ( also known at sender score certified )
This has been working for us very nicely, With 95% email deliverability (sending 75,000 to 100,000 emails per month). These are sent on port 25 with a computer software called "group mail" by infacta. It works very nicely, and I am not looking for suggestions on changing my current set up.
We recently changed infrastructure and I am needing little bit of assistance. In our last Mailout of 70,000 marketing emails the return path service didn't register one single email as having been sent. (They use the IP address, that is our static IP, to monitor this).
Also, the various feedback loops (FBL) that we are subscribe to such as with Hotmail and Yahoo did not register any complaints from any users, which is also odd.
When I do a "what is my IP?" query on Google, they give the following response:
Your public IP address is 220.127.116.11
This is indeed my static IP.
I think that the problem is that: my PC which is sending the emails is behind a router (namely, Apple Time machine). Does that change the IP address which the various services are seeing as having sent the emails?
Would my computer is being behind router make it have a different IP address for the purposes of the various services seeing who is sending the emails? If so, is my solution simply to directly connect the computer to the modem and not use the router when I am doing the mail out? I think that would work, however I wanted to get professional opinion before attempting another Mailout.
That me know your opinions.
Thank you so much for your help!