1
WP Mail SMTP Paid version Pro
Alerts via email, Slack, Teams, Discord, Twilio SMS or webhooks.
96feature score
WordPress SMTP & Email Delivery Plugins with Failure alerts
Alerts by email, Slack, SMS or push when sending fails. 5 of the 8 plugins we track include it.
2
Easy WP SMTP Paid version Basic
Alerts via email, Slack, Teams, Discord, Twilio SMS or webhooks.
97feature score
3
FluentSMTP Included
Instant failure alerts to Slack, Telegram, Discord or Pushover.
89feature score
4
Post SMTP Included
Free alerts by email, Slack, Pushover, Chrome extension or app; Twilio and Teams are Pro.
90feature score
5
SureMail Via add-on
Needs the separate OttoKit plugin (free plan available) using the 'Email Failed to Send' trigger.
81feature score