"Reply to" address is set to receiver's address on gmail?

"Reply to" address is set to receiver's address on gmail?

I'm using zoho with my own domain and I've just noticed that if I send an email to an Gmail account, when the receiver press "reply", the "to" address is fill with his own mail. The weird thing is that if you look at the email details, the From/To addresses are correctly set. Are someone also seeing this behaviour?