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Comment by slau

2 years ago

I was mainly responding to OP’s claim that this is “a security leak”. Likewise, from OP, I mainly understood that this was only an issue when giving a third party the headers of emails you have received.

However, you (and other commenters) appear to be indicating it’s also in the headers of all sent emails?

I’ve been using Fastmail for nigh on a decade, however if this turns out to be true, I may accelerate my migration towards Migadu.