Send Emails Using Bash

Bash scripting can automate email delivery on Debian-based Linux systems using command-line tools and SMTP services, but each method requires the relevant software and mail server configuration. The overview uses Mailtrap SMTP as an example, requiring account creation, domain verification, SMTP credentials, and configuration in files such as ssmtp.conf or msmtprc, while noting alternatives including Gmail with app-password security requirements. It demonstrates sending plain-text, HTML, multi-recipient, and attachment emails with mutt, explains that sendmail handles formatted messages but not attachments natively, and notes version-specific attachment support in mailx. The supported msmtp client is presented as a replacement for the discontinued ssmtp, with features including SMTP profiles, forwarding, proxy support, and integration with mail user agents. It also describes sending production emails through the Mailtrap Email API using curl and a bearer token, checking delivery in email logs, and testing messages through Mailtrap’s sandbox SMTP environment and inboxes before live delivery.

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