Canon DU7-1178-000 Service manual - page 66
Chapter 2
2-14
If the size of the mail is in excess of the 'transmission data size upper limit' set in user mode as prescribed
for mail division (message/partial) in RFC2045 and RFC2046, the mail will be transmitted using the upper
limit.
If the mailer supports RFC, this function enables merging of received mails.
However, if the communication is by way of a mail server, there will normally be an increase in the mail
data size when the server affixes a Received header.
To accommodate the fact, the division is initiated with a safety margin of about 4K bytes at time of trans-
mission.
-mail data will carry 'message/partial' as 'MIME Content Type' to indicate the use of divided transmission.
-there will be indications of 'number', 'total', and 'division ID'.
-'division ID' is a character string made up of the following: date of transmission, time of transmission,
0000 (fixed character string), transmission file number, host name.
-all units of the same mail will have the same ID'.
ex:
Content-Type: message/partial; number=1; total=3;
id="20041110104508.0000.CanonTxNo.0105@e320g-43-1.ccm.canon.co.jp"
(2)Page-Based Division Transmission
The attached image data is divided with reference to page breaks within the 'transmission data size upper
limit' specified in user mode, transmitting it by dividing it into multiple mails.
If Multi Page TIFF or PDF is selected, multiple pages up to the specified upper limit will be transmitted
as a single Multi Page TIFF or PDF file.
If transmission is by collecting multiple files inside a Box, the transmission will be as a single job, increas-
ing the possibility of its being divided.
If the size of the attached image data for a single page is in excess of the setting, the transmission will be
handled as an error, ending the ongoing transmission.
If the setting is '0', no division of the data will occur, and all data will be transmitted as a single mail re-
gardless of its size.
Default maximum data size is 3MByte.
Example of Divided Transmission for Multiple Files
When using PDF transmission of the following 3 files:
-file A, consisting of 5 pages
-file B, consisting of 6 pages
-file C, consisting of 2 pages
In keeping with the setting for divided transmission, the mail will be divided as follows, converted into
PDF files, and transmitted as 3 mails:
-mail 1, consisting of 1 through 5 pages of file A + 1st page of file B (as PDF file)
-mail 2, consisting of 2 through 6 pages of file B + 1st page of file C (as PDF file)
-mail 3, consisting of 2 pages of file C (as PDF file)
F-2-5