1. Tap    in the email you are composing.
2. Tap ‘Security Level’.
3. Select the level, valid period, and whether to prohibit forwarding.
   

   Level	Select ‘Restricted’ or ‘Confidential’ for the security level depending on the content of the email.
   Valid period	The email will be deleted after the set period. You can select the valid period in the term of one day, one week, one month, three months, or choose not to specify.
   Prohibit forwarding	You can set whether to prohibit the email from being forwarded to others.

4. Tap ‘Confirm’.

1. Click  on the top.
2. Click ‘Compose’ in Mail.
3. Select a security level from the ‘Security’ field in the Compose Mail.
4. Select the valid period and whether to prohibit forwarding.
   

   Security	Select ‘Restricted’ or ‘Confidential’ for the security level depending on the content of the email.
   Expires after	The email will be deleted after the set period. You can select the valid period in the term of one day, one week, one month, three months, or choose not to specify.
   Prohibit forwarding	You can set whether to prohibit the email from being forwarded to others.

1. Tap ‘Security Level’ in the email you are composing.
2. Select the level, valid period, and whether to prohibit forwarding and tap ‘Confirm’.

1. Select the security level in the ‘Security’ section of the email you are composing.
2. Select the valid period or whether to prohibit forwarding.

In the email you are composing, tap  beside Security Level to delete the security level. After deleting the security level, you can set another one again.

On the top of an email you are composing, click  on the right side of the set security level value.