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When you provide us with any address you wish us to send from, we enter that address into our account at authSMTP, which triggers an email TO that same email address. The email advises whoever monitors the email address you provided that saar@b4checkin.com or steve@b4checkin.com is requesting your permission for authSMTP to send from the address.
Here is an example of the request.
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To provide your permission, follow the click-through instructions in the request.
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