Settings reference

Go to BooleanSMTP → Settings in your WordPress admin. These settings apply to your whole site — a connection’s own fields, like its provider credentials or its From address, are edited on the connection itself, under Mailers.

Delivery & Reliability

Setting	What it does	Default	Explained on
Default Connection	The connection used when nothing more specific claims the message.	System Default (PHP Mail)	How a connection is chosen
Fallback Connection	Retried once, immediately, when the primary send fails.	On, no connection chosen	Fallback and retries
Retry on other connections	Queues a still-failing send for up to 2 more retries on your other active connections.	On	Fallback and retries

Logging & Retention

Setting	What it does	Default	Explained on
Log All Active Emails	Keeps a delivery record, visible on Email Logs, for every outgoing email.	On	Log retention
Log mailer resolution to PHP error log	Writes one JSON line per email to your server’s PHP error log, showing which connection and transport were chosen.	Off	Log retention
Retention Period	How long email logs are kept before BooleanSMTP clears them automatically.	30 days	Log retention

Testing & Content

Setting	What it does	Default	Explained on
Email Simulation Mode	Records outgoing emails to Email Logs instead of sending them.	Off	Simulation mode
Auto-generate Plain Text	Creates a plain-text alternative for an HTML email, which improves compatibility with some inboxes.	On	—
Test Email Activity Console	Shows the SMTP handshake on the Test Email page when you send a test.	Off	—

Next steps

• How a connection is chosen
• View email logs
• Troubleshooting