HP MFP Sending Software 4.0 to 4.20 manual Embedded e-mail

	Embedded e-mail
		2. SMTP relay
	1. E-mail job (SMTP)
	E-mail with HP DSS	SMTP gateway
		3. SMTP relay
	1. E-mail job (DSMP)	2. E-mail job (SMTP)
	HP DSS server	SMTP gateway
Figure 2-1	Embedded and service-based e-mail

When using embedded send-to-e-mail, the MFP sends e-mail by using SMTP/MIME to transfer an e-mail with the scanned image attached as a separate file to the pre-configured SMTP gateway. By default, SMTP uses the TCP/IP port 25.

NOTE This port cannot be changed in HP DSS versions earlier than 4.3. A custom port can be configured in V4.3 of the software. Contact HP Customer Support for assistance with changing the port.

If the SMTP gateway is configured to relay e-mail, the e-mail with the attachment is relayed to the destination address(es). The MFP uses an “anonymous” connection to the SMTP gateway. If the SMTP gateway is not configured to accept anonymous connection, the SMTP administrator must add the TCP/IP address or hostname of each MFP configured for the SMTP gateway into an “exception list” for this specific SMTP gateway.

When the MFP is configured to use HP DSS to send e-mail, the send-to-e-mail jobs are routed to the HP DSS server over TCP/IP by using DSMP (Digital Sender Module Protocol–an encrypted HP- proprietary protocol). The HP DSS server then uses SMTP/MIME to transfer these send-to-e-mail jobs to the SMTP gateway that is specified in the HP DSS configuration. Beginning with version 4.3 of the HP DSS program, authenticated SMTP is supported for sending e-mail using HP DSS.

ENWW Technology overview 5