Canon DU7-1178-000 Service Manual

Also see for Color Network UFR Printer Kit-C1: Service manual Quick setup guide

Chapter 22-8Encrypted SMTP ReceptionThe iR 2270 and later models support SSL (TLS) encryption for receiving email messages from SMTPservers. To use this feature, a valid server certificate is required. When SSL or On option is selected forAllow SSL (SMTP Receive)* and the email server supports STARTTLS command, the imageRUNNER/iR can communicate with encrypted packets using SSL (TLS). When Off option is selected for Allow SSL(SMTP Receive) control, the imageRUNNER/iR does not include STARTTLS in a response for EHLO.The communications slows down since not only the user name and password but also the entire data foremail sending are encrypted. When Off option is selected for Allow SSL (SMTP Receive) or the emailserver does not support STARTTLS command of SMTP protocol, the communication packets are not en-crypted.*Allow SSL (SMTP Receive) control: is displayed by selecting Additional Functions > System Settings> Network Settings > Email/I-Fax > Authent./ Encryption.STARTTLS CommandAn extended SMTP command that notifies a start of encrypted communications in SSL/TLS to the SMTPserver, defined in RFC 2487.The following lines exemplify communications when STLS is enabled....S: 220 mail.imc.org SMTP service readyC: EHLO mail.example.comS: 250-mail.imc.org offers a warm hug of welcomeS: 250-STARTTLS :<-- Indicates the server supports STARTTLS.S: 250 DSNC: STARTTLS : <--Declares the use of SSL/TLS.S: 220 Go aheadC: C & S: C & S: -- The communication packets are encrypted from now on --C: EHLO mail.example.comS: 250-mail.imc.org touches your hand gently for a momentS: 250 DSNC: MAIL FROM S: 250 Sender OK...The client is notified with the response of EHLO that the server supports STARTTLS. When the clientissues STARTTLS command, the server and client perform TLS negotiation and resume communicationsfrom the beginning with encrypted packet data.If SSL option is selected for Allow SSL (SMTP Receive) control and the client carry on communicatingin plain text, without using STARTTLS, the imageRUNNER/iR replies "530 Must issue a STARTTLScommand first" of SMTP mail command and terminates the SMTP connection with the error. The userinterface indicates "SSL Error (SMTP RX Reject)" in the status line.If On option is selected for Allow SSL (SMTP Receive) control, the imageRUNNER/iR accepts commu-nications with the client in plain text, without using STARTTLS. If an SSL processing results in an error,for example the imageRUNNER/iR does not feature an encryption algorithm common to the client, theuser interface indicates "SSL Error (SMTP Receive)" and terminates the SMTP connection with the error.Allow SSL (SMTP Receive) control defaults to Off.