How to Send Emails With Google App Script

Google Apps Script can send email through MailApp for simpler plain-text or HTML messages or GmailApp for deeper Gmail integration, including sent-mail visibility, aliases, search, labels, rich formatting, attachments, and recipient controls. The walkthrough uses GmailApp to demonstrate creating and authorizing a project, sending plain-text and HTML messages, retrieving Google Drive files by name or ID for attachments, and addressing multiple, CC, and BCC recipients. It also describes automation through triggers, such as sending alerts when a Google Sheets cell meets a condition or generating customized messages after Google Form submissions. Key platform constraints include account-dependent daily sending quotas, execution-time and concurrency limits, restrictions on external requests, and project, storage, and library limits. For additional delivery infrastructure, analytics, customization, and potentially greater scale, the material outlines using UrlFetchApp to call an external email API, with examples covering plain text, HTML, attachments encoded in Base64, and multiple recipients.

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