Getting error in sending mail through Close CRM

[nbfcadvisory]

Your Task History ID

IjU3NjUwNTY4MDYzZTA0MzU1MjY0NTUzMzUxM2I1MTYyNTQzMTBmMzMi_pc

Getting error in sending mail through Close CRM, this message is showing that I already subscribed this mail but it's showing in all mail. even after use the new mail id

 

[ArshilAhmad]

Please make a short screen recording and elaborate a bit more on the exact issue you are encountering.