Gravity SMTP

Gravity SMTP is built specifically to fix WordPress email delivery problems, routing all your outgoing email through reliable SMTP providers to prevent messages from landing in spam. It includes automatic failover to backup mailers if your primary provider goes down, and you can track email opens to see how many recipients actually read your messages.

This plugin works best if you're having trouble getting WordPress emails delivered or want to improve your sender reputation. It pairs well with other email plugins or services because it focuses solely on the delivery layer, ensuring your messages arrive reliably without replacing your email marketing platform.