Once you've identified the cause, you can implement specific solutions to mitigate slow email delivery:
Segment Your List: Break down your email list into smaller segments to avoid overwhelming servers and improve deliverability. Optimize Email Content: Ensure your email content complies with spam filter guidelines to prevent unnecessary scrutiny. Use a Reliable ESP: Choose a reputable Email Service Provider that offers robust infrastructure to handle large volumes efficiently. Stagger Email Sends: Schedule emails to be sent in batches over time rather than all at once to avoid server overload.