Linux Mint 18.3 (Ubuntu Xenial) and claws-mail
I did this procedure to test from xenial-proposed.
NOTE: I am not sure this procedure is correct and invite comments!
In: Update Manager | Edit | Software Sources | Additional repositories
Add: deb http://archive.ubuntu.com/ubuntu/ xenial-proposed
Also for me. It used to work, but now claws-mail is unable to read my
yahoo email. Running Mint 18.3 (Ubuntu Xenial).
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