We're observing voicemails coming from firstname.lastname@example.org on behalf of the actual sender. As per checking the headers it passed the "SPF" check. Even the below following information pertains that it came from the actual caller.
Additionally we're getting voicemails also from other "email@example.com senders".
Is this considered to be legitimate and is being relayed through Skype Business Voice Mail Service? Not really sure what sbvmsvc means.
Lastly, does we tried to replicate the same using teams but the header shows that the voicemail came from our inbox directly, not from a separate relay sender.