Hi Kostya,
thank you for this great app. So please don't get me wrong on this. I think this is a big security and privacy issue, because spammers and tracking companies can check, if and when and how often a user opened an email, the DNS-IP, possibly even the worldwide location where the user opened the email, or even that hes using aquamail on android to read his mails. This behaviour opens up the possibilities for cross-device tracking and device-fingerprinting, which allow the assignment of universal unique user ids to devices and can compromise your users privacy severely.
Please fix this. Thank you in advance!
cheers!
ntm