FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, Mailgun, Postmark, Cloudflare, toSend, Gmail and Any SMTP

2.3.1 (Date: Aug 13, 2026)

Added an optional Directory (tenant) ID for Outlook / Office 365, for single-tenant Entra app registrations that cannot accept personal Microsoft accounts

Fixed “Could not instantiate mail function.” on the PHP mail() connection when a host or plugin selects its own transport from the phpmailer_init hook

Fixed mail routed outside FluentSMTP being sent through the site’s own SMTP relay when a bulk sending session held a connection open

2.3.0 (Date: Aug 05, 2026)

Added Cloudflare Email Sending Provider

Added Recipient Picker and Resend History for Email Logs (props @faisalahammad)

Added Daily Connection Health Check with dashboard alerts and failure notifications

Added WP-CLI commands for test email, connection health, stats and log pruning

Added Amazon SES EU Sovereign Cloud region (Germany, Brandenburg)

Added send time tracking on every email log

Added fluent_mail/manage_capability filter to change the required admin capability

Added inline image embedding for SMTP connections via the wp_mail_embed_args filter

Added inline setup guides for Cloudflare and toSend

Improved sending speed with connection reuse for Amazon SES, toSend and FluentCRM bulk sending

Improved Email Log performance with a new database index and batched pruning

Updated the wp_mail() replacement to match WordPress 7.0 core

Fix: List-Unsubscribe one-click headers were encoded and ignored by mailbox providers on Amazon SES, Gmail and Outlook (props @rogerjudd)

Fix: