ASN1 error, not enough memory

Error:

When receiving and decrypting a 5MB email, the email is rejected and the error “ASN1 not enough memory” is displayed. The same error is also displayed in message tracking.

Status:

This problem occurs because a buffer size is not properly increased by the .NET framework. This problem is known to Microsoft and can be fixed with the hotfix below.

Solution:

To resolve this problem, install the following Microsoft hotfix: http://support.microsoft.com/kb/2480994/de

https://support.microsoft.com/de-de/topic/-asn1-out-of-memory-error-when-the-cryptmsgupdate-function-decodes-a-message-that-is-larger-than-5-mb-in-windows-7-or-in-windows-server-2008-r2-45bf5a94-15ed-8b1e-a562-466cb981f2f7