We recently switched our email system over to Microsoft 365. I'm using a third-party SMTP provider (SMTP2GO) to send voicemails from the NEC SV9100 to the recipient's email since the 9100 doesn't support Microsoft OAuth. Everything has been working well until recently when I've started seeing bounced emails. The error message is: "550 Multiple From addresses are not allowed without a Sender address". After discussing this with the SMTP provider, we discovered the issue. The SV9100 is pulling the caller ID name into the from line of the email. The bounced emails all contain a comma "LAST NAME, FIRST NAME" which is interpreted by Microsoft as being multiple from addresses. Most of our voice mails don't have commas but I'm seeing a few each day now and I'm worried that customers will become irritated that they're not being called back because our customer service folks aren't receiving those voice mails.
Is there anyway to get the SV9100 to not pull the caller ID into the from address? Thanks!
Is there anyway to get the SV9100 to not pull the caller ID into the from address? Thanks!