Howto to reproduce:
Add random sender as kopano-contact via UCS to address-book (email = firstname.lastname@example.org Last name = BLA BLUPP)
Send e-mail as email@example.com to kopano mailbox.
Check mail in inbox and see sender is BLA BLUPP firstname.lastname@example.org
Everyting fine so far
Delete kopano-contact BLA BLUPP
wait a few seconds (resync timer whatever / reload inbox)
Check Mail in Inbox again - sender is now BLA BLUPP
No email address visible anymore. And replying to this email is not possible with “reply” anymore. No email address is copied into TO: Field.
Kopano support says it can not reproduce. I can on all of our kopano/UCS-Servers.
Can anyone please test as well?