I use Mailwasher Pro to screen e-mail. eM Client doesn’t receive all the messages Mailwasher finds even if they aren’t marked as spam or for deletion.
Send us your logs please: go to menu Tools->Settings->Advanced->Logging and check “IMAP” under the problematic account. Then restart eM Client, try to simulate the issue and send us (with reference to this topic) the logs along with the subject of a message which did not come through using the same logging settings window. Thank you.