Hi,
I am researching the potential that my emails are being blocked by one particular company. I know that they are delivered according to Marketo, but there are no opens. I think they are being caught in company spam filter, and assume it is based on the sender ip address that comes through. If this is the case, is there a way to get what the ip address would be (being that emails are sent through Marketo - would that make IP address not my own company IP?)...
I also heard you could create multiple IPs so that you can alternate and avoid Spam from one particular IP address? Is this considered email best practice or just being sneaky?