Managing a very large pool of email recipients can lead to several issues:
Deliverability Issues: Sending emails to a large number of unengaged or outdated addresses can lead to higher bounce rates and can cause your emails to be marked as spam. Personalization: It's challenging to personalize emails for a large, diverse audience, which can lead to lower engagement rates. Higher Costs: Most email marketing services charge based on the number of subscribers. A larger pool can significantly increase your costs without necessarily providing a proportional return on investment.