Versions

13.6.20.2174	21.21%
13.6.20.2174	3.03%
13.6.20.2174	3.03%
13.6.20.2174	3.03%
13.6.20.2174	6.06%
13.6.20.2174	3.03%
13.6.1.1626	6.06%
13.6.1.1626	3.03%
13.6.1.1262	6.06%
13.6.1.994	3.03%
13.6.1.402	9.09%
13.6.1.402	3.03%
13.4.1.255	3.03%
12.3.1.15	21.21%
12.3.1.15	3.03%
12.3.1.15	3.03%

msgclient.dll has 16 known versions, the most recent one is 13.6.20.2174. The average file size is about 198.01 KB. It is an authenticode code-signed executable issued to Avira Operations GmbH & Co. KG by the certification authority VeriSign.

Avira Message Client is part of Avira Free Antivirus, a free antivirus program from Avira that runs as a background process which checks every file opened or downloaded. Like many antivirus programs, it can run a full or custom scan to check the PC for malware in order to remove them. It updates its virus definitions automatically everyday by default using the Internet.