After the update of the iOS 11.2.1, many users of iPhone and iPad complain of an issue of functionality the application of the mail of iOS (developed by Apple). Specifically, when they are trying opening or loading in the background of some messages, the application displays an white screen (white screen), after that closes or It remains in the background, stop the user to be able to delete or read messages received.
It seems, this problem arises after receiving messages with atasamene in format .P7S. This type of file is specific secure documents with electronic signature. P7s is used for sending secure messages, visualization of some encrypted documents or with electronic signature or receipt of secure messages. At the same time, through a .P7S file it can be verified if a document sent with it, has undergone changes during the transmission from the sender to the recipient.
Those who are familiar with electronic lictitatii system (SEAP) or with the messages received from some banks are familiar with the .p7s extensions.
These days, after the iOS 11.2.1 was launched, a message received from Raiffeisen Bank made it impractically the mail application on iPhone and iPad for many users. When trying to open the message from the bank or when it is trying to download it in the backgound, the screen becomes white and the email application closes or passes into the background. The problem encountered by us on the iPhone 6s and iPhone 7.
How do I solve the problem of sudden closing of the application when you open a Mail message with the extension. P7s
The simplest option is to open the message from the PC, and then remove it from both inbox and trash. If it is left in trash, on the iPhone it will still try to download it in background and the problem can persist. So we go to the Browser from PC on http://icloud.com (If the message is received on a @icloud.com address), we read the email with attachment, we wipe it from the inbox, then we go to the trash and we delete it from there.
We open the iPhone email application and make a swipe from top to down over messages, to refresh the list of messages. It is very possible that the email application will close once again. After this step everything will work normally.
It is not known why this error / crash of the mail application appears at the opening of secure messages with .p7s, but it is most likely a bug of the new iOS 11 version.
