I have found that I am missing two years of emails in eM Client. Unfortunately I use a POP connection so the emails are not on the server.
I had a look in my log files for eM Client and noticed the following from the time that the emails disappeared:
12/13/2017 20:51:48 778 os_win.c:33523: (1393) winWrite2(C:\Users\Admin\AppData\Roaming\eM Client\mail_index.dat-wal) - The disk structure is corrupted and unreadable.
12/13/2017 20:51:51 778 os_win.c:33523: (1393) winWrite2(C:\Users\Admin\AppData\Roaming\eM Client\mail_index.dat-wal) - The disk structure is corrupted and unreadable.
12/13/2017 20:51:52 266 os_win.c:33412: (1393) winRead(C:\Users\Admin\AppData\Roaming\eM Client\privacylists.dat-wal) - The disk structure is corrupted and unreadable.
12/13/2017 20:52:01 1546 os_win.c:33561: (1393) winTruncate2(C:\Users\Admin\AppData\Roaming\eM Client\main.dat-shm) - The disk structure is corrupted and unreadable.
12/13/2017 20:52:01 4618 os_win.c:34446: (183) winOpenShm(C:\Users\Admin\AppData\Roaming\eM Client\main.dat) - Cannot create a file when that file already exists.
12/13/2017 20:52:01 4618 disk I/O error
12/13/2017 20:52:01 1546 os_win.c:33561: (1393) winTruncate2(C:\Users\Admin\AppData\Roaming\eM Client\main.dat-shm) - The disk structure is corrupted and unreadable.
12/13/2017 20:52:01 4618 os_win.c:34446: (1393) winOpenShm(C:\Users\Admin\AppData\Roaming\eM Client\main.dat) - The disk structure is corrupted and unreadable.
12/13/2017 20:52:48 1546 os_win.c:33561: (1393) winTruncate2(C:\Users\Admin\AppData\Roaming\eM Client\main.dat-shm) - The disk structure is corrupted and unreadable.
12/13/2017 20:52:48 4618 os_win.c:34446: (183) winOpenShm(C:\Users\Admin\AppData\Roaming\eM Client\main.dat) - Cannot create a file when that file already exists.
12/13/2017 20:52:48 4618 disk I/O error
12/13/2017 20:52:48 1546 os_win.c:33561: (1393) winTruncate2(C:\Users\Admin\AppData\Roaming\eM Client\main.dat-shm) - The disk structure is corrupted and unreadable.
12/13/2017 20:52:48 4618 os_win.c:34446: (1393) winOpenShm(C:\Users\Admin\AppData\Roaming\eM Client\main.dat) - The disk structure is corrupted and unreadable.
12/13/2017 20:52:58 1546 os_win.c:33561: (1393) winTruncate2(C:\Users\Admin\AppData\Roaming\eM Client\main.dat-shm) - The disk structure is corrupted and unreadable.
12/13/2017 20:52:58 4618 os_win.c:34446: (183) winOpenShm(C:\Users\Admin\AppData\Roaming\eM Client\main.dat) - Cannot create a file when that file already exists.
12/13/2017 20:52:58 4618 disk I/O error
12/13/2017 20:52:58 1546 os_win.c:33561: (1393) winTruncate2(C:\Users\Admin\AppData\Roaming\eM Client\main.dat-shm) - The disk structure is corrupted and unreadable.
12/13/2017 20:52:58 4618 os_win.c:34446: (1393) winOpenShm(C:\Users\Admin\AppData\Roaming\eM Client\main.dat) - The disk structure is corrupted and unreadable.
12/13/2017 21:55:38 1546 os_win.c:33561: (1393) winTruncate2(C:\Users\Admin\AppData\Roaming\eM Client\main.dat-shm) - The disk structure is corrupted and unreadable.
12/13/2017 21:55:38 4618 os_win.c:34446: (183) winOpenShm(C:\Users\Admin\AppData\Roaming\eM Client\main.dat) - Cannot create a file when that file already exists.
12/13/2017 21:55:38 4618 disk I/O error
12/13/2017 21:55:38 1546 os_win.c:33561: (1393) winTruncate2(C:\Users\Admin\AppData\Roaming\eM Client\main.dat-shm) - The disk structure is corrupted and unreadable.
12/13/2017 21:55:38 4618 os_win.c:34446: (1393) winOpenShm(C:\Users\Admin\AppData\Roaming\eM Client\main.dat) - The disk structure is corrupted and unreadable.
12/13/2017 21:55:50 1546 os_win.c:33561: (1393) winTruncate2(C:\Users\Admin\AppData\Roaming\eM Client\main.dat-shm) - The disk structure is corrupted and unreadable.
12/13/2017 21:55:50 4618 os_win.c:34446: (183) winOpenShm(C:\Users\Admin\AppData\Roaming\eM Client\main.dat) - Cannot create a file when that file already exists.
12/13/2017 21:55:50 4618 disk I/O error
12/13/2017 21:55:50 1546 os_win.c:33561: (1393) winTruncate2(C:\Users\Admin\AppData\Roaming\eM Client\main.dat-shm) - The disk structure is corrupted and unreadable.
12/13/2017 21:55:50 4618 os_win.c:34446: (1393) winOpenShm(C:\Users\Admin\AppData\Roaming\eM Client\main.dat) - The disk structure is corrupted and unreadable.
12/13/2017 22:00:37 1 no such table: mail_fti.SubjectIndex_stat
12/13/2017 22:00:37 1 no such table: mail_fti.AddressIndex_stat
12/13/2017 22:00:37 1 no such table: mail_fti.LocalMailsIndex3_stat
12/13/2017 22:16:22 1 no such table: mail_fti.SubjectIndex_stat
12/13/2017 22:16:22 1 no such table: mail_fti.LocalMailsIndex3_stat
12/13/2017 22:16:22 1 no such table: mail_fti.AddressIndex_stat
12/13/2017 23:49:27 1 no such table: mail_fti.SubjectIndex_stat
12/13/2017 23:49:27 1 no such table: mail_fti.AddressIndex_stat
12/13/2017 23:49:27 1 no such table: mail_fti.LocalMailsIndex3_stat
Is anyone able to make sense of the above? Is there anything that can be done to get my emails back?