Problem with string containing Brackets

[Anonymous]

Hello,
I need some help on what I think is an easy issue.
I have a tSendMail component and I'm trying to write the object of the e-mail as follows: "[EXTERNAL] Attached csv files".

The problem is that when i receive the e-mail the object is the following: "Attached csv files".

The text contained between the brackets disappear, is it normal?
I need to write it in that way and I cannot change the brackets to round brackets.

Could you Help me?
Thank You

[cterenzi]

I would contact the mail server admin for assistance.

[Anonymous]

@cterenzi, do you have any advice on what to ask to the mail server admin?

[cterenzi]

Explain your issue to him. You're trying to send emails with a certain subject, and under certain circumstances, the [EXTERNAL] tag is being stripped.