1
WP Mail SMTP Paid version Pro
Background queue and rate-limit queue; failed sends are retried through the backup connection.
96feature score
WordPress SMTP & Email Delivery Plugins with Automatic retry & queue
Queues emails and retries failed sends automatically. 5 of the 8 plugins we track include it.
2
Easy WP SMTP Paid version Basic
Background queue and rate-limit queue; failed sends retried via the backup connection.
97feature score
3
Post SMTP Paid version Professional
Auto-retry a set number of times, with batching and quota scheduling.
90feature score
4
SureMail Included
Failed emails are retried automatically across all connections after 30 minutes.
81feature score
5
Solid Mail Partial
Failed sends are retried immediately through another connection; no queue or delayed retries.
40feature score