I want to display an alert when the size of an attachment exceeds 18MB.

[hkriwk1]

When you create an email from the case form, you can compose it in a new tab.
I want to implement a mechanism where, if you attach a file in that tab and its size exceeds 18MB, a popup appears.
How can these be achieved?

[Shruti D]

Hello @hkriwk1,

Please refer below links:
 Attachment size pop up 

Attachment limit properties

Please Mark Correct ✔️ if this solves your query and also mark Helpful 👍 if you find my response worthy based on the impact.

Regards,
Shruti

[Ankur Bawiskar · Accepted solution]

@hkriwk1 

you can use before insert BR on sys_attachment table and block the insert but you can't show the info message.

If my response helped please mark it correct and close the thread so that it benefits future readers.

[hkriwk1]

After looking into it a bit more, I found this.

https://www.servicenow.com/community/developer-forum/how-to-customize-the-send-button-of-the-email-c...

“email_client.do” seemed to be black-boxed.

[Ankur Bawiskar]

@hkriwk1 

so ideally there is no way to handle this right?