1
WP Mail SMTP Included
WP-CLI commands (since 4.9), constants and filters for developers.
96feature score
WordPress SMTP & Email Delivery Plugins with Developer hooks & WP-CLI
Hooks, filters or WP-CLI commands for developers. 7 of the 8 plugins we track include it.
2
Easy WP SMTP Included
WP-CLI commands (since 2.15) and constants for configuration.
97feature score
3
FluentSMTP Included
WP-CLI commands for test, health, stats and prune-logs, plus constants.
89feature score
4
Post SMTP Included
Documented action and filter hooks; constants for logging and auth.
90feature score
5
SureMail Included
Filters such as suremails_before_send_email and suremails_provider_list, plus Abilities API; no WP-CLI.
81feature score
6
Solid Mail Partial
REST endpoints for connections and a few filters; no documented hooks or WP-CLI.
40feature score
7
Gmail SMTP Partial
A few filters (gmailsmtp_reply_to, gmailsmtp_cc, advanced settings fields); no WP-CLI.
23feature score