forwarding eMails from exchange misses sender address

when forwarding eMails from Exchange to Icewarp, there is nop sender address displayed in icewarp.

Even in the code of the eMail there is a from-address, there is no from address shown in smtp log.
And the from-address in email-source shows two dashes as visible name like "–[email protected]

see:
smtp-log: 13:52:04 <<< MAIL FROM:<> SIZE=4130 BODY=7BIT

eMail-source: From: – – [email protected]

in the end the eMails show iup in the Inbox coming from "–" which kills all sorting. Even the sender address is then showed in the eMail-Windo anyway.

Someone knows how to push Exchange to send the FROM with smtp?

INFO: The same happened if i create a transport rule 🙁

Get-MessageTrackingLog -Sender <Sender's email address> -Recipients <Email address from icewarp server> -MessageSubject "<Subject>" -Start "<Start Date and Time>" -End "<End Date and Time>