Hallo, cause of we import our lists from mailman 2.1 to mailman3 as Alex Schuilenburg did, i did take a look in hyperkitty_sender and find an address like it is discribed above ( "firstname surename"@... ); i did insert,update and delete this address. Now the sync is working and all is fine.
Well, excuse my ignorance; cause of i have import the patch and set the logging level to debug but i could not find any more detailed error messages into the log files. Therefor im glad about to figured out the problem and for the solution. Thank you all