I received this mail from Avira:
A listing of files alongside their results can be found below:
File ID Filename Size (Byte) Result
28782885 sendmail.exe 572 KB FALSE POSITIVE
Please find a detailed report concerning each individual sample below:
sendmail.exe FALSE POSITIVE
The file 'sendmail.exe' has been determined to be 'FALSE POSITIVE'. In particular this means that this file is not malicious but a false alarm.