Sending Email over SMTP in BAS

Reading mail is one half of email automation; sending it is the other. The Send Email module does that through SMTP, the standard protocol for delivering email across the internet.

What it’s for

The module sends letters through the SMTP protocol — the network protocol for transferring email. Every email service runs its own SMTP server, and you send through the one belonging to your account’s provider. Where the Mail (IMAP) module receives, this module sends.

The actions

• SMTP settings — configure the provider’s SMTP server and your credentials.
• SMTP proxy — route the sending connection through a proxy.
• Send email — compose and send the message.
• Enable debug — turn on debug output to diagnose why a send failed.

The realities of SMTP sending

Because email is so heavily abused for spam, providers defend their SMTP servers, and your bot has to play by those rules:

• Throttling. Many email services limit the speed and number of messages you can send over SMTP. Push too hard and you’ll be rate-limited or blocked.
• App passwords. Providers increasingly require an app-specific password instead of your normal account password to send via SMTP. Generate one in the account’s security settings and use that.

Treat sending as something to do slowly and within limits. SMTP is the right tool for legitimate transactional or notification mail you’re authorised to send — not for blasting volume, which is exactly the behaviour providers throttle. For quick status pings to yourself, Telegram is usually the lighter choice.