I have created a managed package in a developer edition org that contains send email button. When I install the package in another test org(dev edition), everything works fine. But , when I install the same managed package in Sandbox every thing works perfect except send email button. I am badly stuck in it. What could be the issue I am unable to debug

1 Answer 1


Please check your email deliverability settings.

To send an email on sandbox, change the setting to "All Emails"

Here is the reference article:

  • I have changed system emails to All Emails , but it wont work @Tanuj
    – reneya
    Commented Jan 18, 2023 at 10:02

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