If your emails have a low open and reply rate and, with that, a high bounce rate, your deliverability will be bad.
The reason for low open and reply rates can be a lack of personalization in your cold email strategy.
If your subject line doesn’t interest your prospect, they will probably delete your mail or mark it as spam in the worst case.
Same counts for the main body of your cold email. Using sales-y language will probably make your prospects close your mail right away.
Trying to start a conversation in normal and objective language while simultaneously showing that you understand your recipients' pain points will increase your reply rate.