Cannot add auto collaborator to this ticket

mantup

Hi
We have two mails in our ticket system: A and B.
I set A as the default mail so when someone sends an email to A to generate ticket and cc another user, that user is set to be a collaborator to this ticket.
This does not happen to B (because this email address is not a default in our system).
Please give me some advice to fix this

ntozier

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Environment details? (see Admin panel -> Dashboard -> Information)

You are not being particularly clear about what is "not happen"-ing.