I mean, I'm in the minority where I actually like Thunderbird as it exists today (well ok, the create filter experience could use less clicks), but Fastmail wor

I mean, I'm in the minority where I actually like Thunderbird as it exists today (well ok, the create filter experience could use less clicks), but Fastmail works perfectly fine in Thunderbird. Actually a little better since I have my fastmail inbox set up as folders not labels, so it avoids that weird impedance mismatch where the Thunderbird UI wants folders but Gmail provides labels. Meanwhile in my employment they turned off IMAP for security reasons, so I'm forced to use the Gmail web interface and it is not up to the task of the volume of email I receive at all.