Email

Connect PRX to any email provider using IMAP for receiving and SMTP for sending, with IDLE push support for real-time delivery.

Prerequisites

• An email account with IMAP and SMTP access enabled
• IMAP/SMTP server hostnames and ports
• Email credentials (username and password or app-specific password)

Quick Setup

1. Enable IMAP Access

For most email providers:

• Gmail: Enable IMAP in Gmail Settings > Forwarding and POP/IMAP, then generate an App Password
• Outlook: IMAP is enabled by default; use an app password if 2FA is active
• Self-hosted: Ensure your mail server has IMAP enabled

2. Configure

[channels_config.email]
imap_host = "imap.gmail.com"
imap_port = 993
smtp_host = "smtp.gmail.com"
smtp_port = 465
username = "[email protected]"
password = "your-app-password"
from_address = "[email protected]"
allowed_senders = ["[email protected]"]

3. Verify

prx channel doctor email

Configuration Reference

Field	Type	Default	Description
imap_host	String	required	IMAP server hostname (e.g., "imap.gmail.com")
imap_port	u16	993	IMAP server port (993 for TLS)
imap_folder	String	"INBOX"	IMAP folder to poll for new messages
smtp_host	String	required	SMTP server hostname (e.g., "smtp.gmail.com")
smtp_port	u16	465	SMTP server port (465 for implicit TLS, 587 for STARTTLS)
smtp_tls	bool	true	Use TLS for SMTP connections
username	String	required	Email username for IMAP/SMTP authentication
password	String	required	Email password or app-specific password
from_address	String	required	From address for outgoing emails
idle_timeout_secs	u64	1740	IDLE timeout in seconds before reconnecting (default: 29 minutes per RFC 2177)
allowed_senders	[String]	[]	Allowed sender addresses or domains. Empty = deny all. "*" = allow all
default_subject	String	"PRX Message"	Default subject line for outgoing emails

Features

• IMAP IDLE -- real-time push notifications for new emails (RFC 2177), no polling delay
• TLS encryption -- connections to IMAP and SMTP servers are encrypted via TLS
• MIME parsing -- handles multipart emails, extracts text content and attachments
• Domain-level filtering -- allow entire domains (e.g., "@company.com") in the sender allowlist
• Automatic reconnection -- re-establishes IDLE connection after the 29-minute timeout
• Reply threading -- responds to the original email thread with proper In-Reply-To headers

Limitations

• Only processes emails in the configured IMAP folder (default: INBOX)
• HTML emails are processed as plain text (HTML tags are stripped)
• Large attachments may not be fully processed depending on memory constraints
• Some email providers require app-specific passwords when 2FA is enabled
• IDLE support depends on the IMAP server; most modern servers support it

Troubleshooting

Cannot connect to IMAP server

• Verify imap_host and imap_port are correct for your provider
• Ensure IMAP access is enabled in your email account settings
• If using Gmail, generate an App Password (regular passwords are blocked with 2FA)
• Check that TLS is not being blocked by a firewall

Emails are not detected

• Verify the imap_folder is correct (default: "INBOX")
• Check that the sender's address or domain is in allowed_senders
• Some providers may have a delay before emails appear in IMAP

Replies are not sent

• Verify smtp_host, smtp_port, and smtp_tls settings match your provider
• Check SMTP authentication credentials (same username/password as IMAP, or separate SMTP credentials)
• Review server logs for SMTP rejection reasons (e.g., SPF/DKIM failures)