Several factors can lead to reduced email deliverability, including:
Spam Filters: Emails can be flagged as spam for various reasons, such as using certain keywords, having a high image-to-text ratio, or including suspicious links. Poor Sender Reputation: ISPs keep track of your sending habits. High bounce rates, many spam complaints, and sending to inactive addresses can harm your sender reputation. Invalid Email Addresses: Sending emails to invalid or non-existent addresses can increase your bounce rate, negatively impacting deliverability. Content Quality: Low-quality content that doesn't engage or is irrelevant to the recipient can lead to low open rates and high spam complaints.