Preventing slow email delivery involves a combination of best practices and technical optimizations:
Segment Your List: Segment your email list to send smaller batches of emails, reducing server load. Optimize Content: Ensure your emails do not contain elements that trigger spam filters, such as excessive images or spammy words. Use a Reputable ESP: Choose a reliable email service provider with a track record of high deliverability rates. Authenticate Emails: Implement DKIM, SPF, and DMARC to improve email authentication and reduce the chances of emails being flagged as spam. Monitor Reputation: Regularly monitor your sending domain's reputation to ensure it remains high.