@Marcos
I have deleted my uploaded log files. I think, Eset is not interested in supporting a longterm customer, who owns multiple payed licenses.
Good to know for the future 😕
@itman
Thx for your time. i have testet all these settings before i opened this threat. the thunderbird at my linux laptop has no problem with my mailserver. also my android smartphone has also no problem with my mailserver. i don't tzhink, my server is the problem