Serious issues connecting Posteo account (calendar and addressbook) with Thunderbird
Hey folks, I have a serious issue with thunderbird and my Posteo account. Neither the calendar (CalDav) nor the address book (CardDav) can be connected to the latest thunderbird version. I always get on of the following errors: "No calendar found under this address. Check Settings" or "Connection failed". Interestingly, the chosen settings work perfectly fine on my smartphone (using Davx5). Any suggestions?