You can change various settings in the mail adapter runtime environment property file when it is necessary to perform settings for performance tuning during mail adapter operations.

For the mail adapter runtime environment property file, see "Mail adapter runtime environment property file" in "Service Platform Reference Guide". The following table lists the items that you can set for Performance tuning:

Table 5-6 Settings for Performance tuning

Item	Key name	Range of setting values	Unit
Mail body size	mailadp.mail.body.size	1~2,048,000	Byte
Size of attachments	mailadp.attach.file.size	0~5,242,880	Byte
Number of attachments	mailadp.max.attach.count.per.mail	0~100	Nos.

The procedure for changing the settings of the mail adapter runtime environment property file during mail adapter operations is as follows:

1. Stop the standard reception.
   For details, see "5.3.28 Terminating the Standard Reception".
   
2. Stop user-defined receptions (receptions other than standard receptions such as SOAP reception and FTP reception).
   For details, see "5.3.29 Stopping the user -defined reception".
   
3. Stop the mail adapter.
   For details on how to stop the mail adapter, see "5.5.2 Starting and stopping the mail adapter".
   
4. To change the setting value, open the mail adapter runtime environment property file with the text editor.
   The storage location of the mail adapter runtime environment property file is "<Service Platform installation directory>\CSC\config\mail".
   
5. Start the mail adapter.
   For details on how to start the mail adapter, see "5.5.2 Starting and stopping the mail adapter".
   
6. Start user-defined receptions (receptions other than standard receptions such as SOAP reception and FTP reception).
   For details, see"5.3.8 Starting user-defined receptions".
   
7. Start the standard reception.
   For details, see "5.3.9 Starting standard receptions".