Mitsubishi Electric MELSEC iQ-F Series User Manual page 32

E-mail specifications
The following lists the e-mail specifications.
Item
Data size Attachment
Message body
Subject
Data transfer method
Subject
Attachment format
MIME
Attachment data format
Splitting of an attachment
Sending (encoding)
Encryption
Compression
Communication with the mail server
*1 A file (such as logging data) in the CPU module or SD card cannot be attached. Attachment data must be generated with a program.
• This e-mail function supports encryption (TLS1.3 and TLS1.2). To enable/disable TLS, select an appropriate
protocol in the external device configuration. When the TLS setting is disabled, TCP connection is enabled.
(Page 79 External Device Configuration)
• For TCP connection, authentication information may be intercepted. Therefore, encrypted communication is
recommended.
• When adding a mail server device in the external device configuration, set the port number of host station.
(Page 79 External Device Configuration)
■Encryption algorythms used in TLS communications
The following table lists the encryption algorythms used in TLS communications.
Function name
SSL/TLS support (client and server)
DTLS support (client and server)
Hash function support
Encryption with block, stream, and authentication
Public-key cryptography
Curve type of ECC
4 FUNCTION LIST
30
4.3 Other Functions
Specifications
*1
32768 bytes  1
When Unicode is selected: 512 characters  1, when ASCII is selected: 1024 characters  1
When Unicode is selected: 64 characters  1, when ASCII is selected: 128 characters  1
Sending: The message body and attachment are sent.
US-ASCII format or Unicode (UTF-8)
MIME format
Version 1.0
Binary, ASCII, or CSV can be selected.
File name: binary (*.bin), ASCII (*.asc), and CSV (ASCII) (*.csv)
Not allowed (Only one file can be sent.)
Subject: Base64/7 bits
Message body: Base64/7 bits
Attachment: Base64
Available (Available for TLS1.3 and TLS1.2)
None
SMTP Port number
Authentication method
Algorithm
TLS 1.2
TLS 1.3
None
SHA-1
SHA-256
SHA-384
SHA-512
AES
RSA
ECDHE-ECDSA
ECDHE-RSA
SECP
SECPR2
SECPR3
No authentication: 25 (Initial value)
SMTPS: 465
Any port (1 to 65534) can be specified.
• No authentication (supported on port 25)
• SMTP-AUTH (PLAIN, LOGIN, or CRAM-MD5) (supported on port 465)
CBC
GCM
GMAC