I'm trying to ramp up my deliverability rates, and I realized we may be being marked as SPAM because we have several contacts per domain (sometimes hundreds) and our email cadence sends to all prospects at the same time. So I think that because the ESP at the domain is receiving sometimes hundreds of our emails at once, they're flagging us. Does anyone know how to alleviate this issue?
Sending to hundreds of emails at once should not be an issue if you have a good reputation. You may have hit spam traps and other pitfalls and this is why you are having trouble.
Yes, my concern is we've already hit those spam traps and are flagged. We just purchased a dedicated IP so I'm trying to keep our reputation up.