Re: dovecot: lda(info@mydomain) - vacation action: discarding vacation response to mailinglist recipient?

Weird, but I think I solved it, I had in my postfix main.cf, a line like:

"header_checks = regexp:/etc/postfix/list_unsub_header"

to have a header like: List-Unsubscribe: mailto:info@mydomain.com?subject=unsubscribe, and when I removed that line, the auto-reply seems worked.

BUT, why's so? The sender is Gmail, List-Unsubscribe header is my own mailbox header, not the Gmail's.. Why it detects the SENDER e-mail account as "mailinglist"?