You might have found yourself in a situation where you're reaching out to your sales leads, but they don't respond. You start cracking your head over what to do to make them read and reply to your emails, but the main problem lies in poor email deliverability.
Problem 1: You haven't warmed up your account
If you have a new account and start sending emails in bulk, don't expect good email deliverability. Emails of senders who haven't proven themselves as legitimate will most likely be flagged as spam.