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by saltyshake 3817 days ago
"Of course, if you reply to it, then you reveal your real address"

Do you ?

I am pretty sure it redirects everything through the CL email proxy and the only way for them to know your real email address is for you to give it to them (or they guess it from your "Name" which the CL relay copies from your email).

2 comments

My bad! Sorry!

CL performs a decent, two-way anonymization. When you reply to a listing's anonymized e-mail, your own e-mail address is anonymized (just not your name, which I think comes from your From: header or SMTP envelope address? In any case, you control that).

Furthermore, the originating SMTP paths are mutually concealed by CL. You don't see how the mail arrived into CL, just how it came from CL to you; i.e. it's completely remailed.

Lastly, even the Message-ID is rewritten. The originator's message ID could contain clues about the mail domain and such; CL replaces it with their own.

Quite probably, they strip away the signatures from bodies as well; those could inadvertently leak identity bits.

[Source: I searched my inbox for some CL interactions, several years old, and examined the headers.]

correct