How do I check if I have published the correct Vtiger DKIM record in the sending domain?

Follow these steps to verify if you have published the correct Vtiger DKIM record in the sending domain correctly:

1. Visit the following website, https://mxtoolbox.com/dkim.aspx.
2. Enter your sending domain name.
3. Enter the following in the Selector field - vtigermail.
4. Click on DKIM Lookup.
   1. For example, refer to the screenshot below.
   2. 
5. Lookup results should display that all three DKIM checks have been cleared. Refer to the screenshot below.

Note: In Vtiger, DKIM is mandatory for both Email campaigns and Ad-hoc emails.