sender

README

sender

The sender package handles email composition and delivery over SMTP. It constructs properly formatted multipart MIME messages and sends them through the configured SMTP server.

Architecture

This package is the SMTP client layer for Matcha. It:

• Builds multipart MIME messages with plain text, HTML, inline images, and file attachments
• Supports S/MIME detached signing and envelope encryption using PKCS#7
• Handles SMTP authentication with both PLAIN and LOGIN mechanisms (fallback for servers like Mailo)
• Supports both implicit TLS (port 465) and STARTTLS (other ports)
• Generates unique Message-IDs and handles reply threading via In-Reply-To and References headers

Documentation

Index

• func SendEmail(account *config.Account, to, cc, bcc []string, ...) error

Functions

func SendEmail

func SendEmail(account *config.Account, to, cc, bcc []string, subject, plainBody, htmlBody string, images map[string][]byte, attachments map[string][]byte, inReplyTo string, references []string, signSMIME bool, encryptSMIME bool) error

SendEmail constructs a multipart message with plain text, HTML, embedded images, and attachments.