1
WP Mail SMTP Included
Do Not Send setting blocks all outgoing wp_mail emails.
96feature score
WordPress SMTP & Email Delivery Plugins with Stop sending / test mode
Block outgoing email on staging sites or while testing. 5 of the 8 plugins we track include it.
2
Easy WP SMTP Included
Do Not Send setting stops all emails sent through wp_mail.
97feature score
3
FluentSMTP Included
Email Simulation logs emails without sending; also a constant to force it.
89feature score
4
Post SMTP Included
Run mode can log emails only, or ignore them, instead of delivering.
90feature score
5
SureMail Included
Email Simulation logs outgoing emails without delivering them.
81feature score