DKIM signature options for Zoho CRM

DKIM signature options for Zoho CRM

Hi all,

When sending mails from ZohoCRM to a Gmail account, we get  "via sender.zohocrm.com" appearing at the top of the message. I've included sender.zohocrm.com to our spf record (include:sender.zohocrm.com) but we still see the "via sender.zohocrm.com" message.

Examining the header, it looks as though the messages are being signed with a DKIM signature.
As far as I can understand, this means Gmail will always consider the message as being from sender.zohocrm.com,  regardless of spf settings.

That being (I think) the case, is there a way to disable DKIM signature on our outbound mails or change it one of our choosing?

Thanks