Yes. To not saturate the server the maximum size is of 2
MB.
Can be scanned simultaneously various archives ?
No. At the moment is necessary scan the archives one by
one.
Are trustworthy the e-antivirus results ?
To analyzing the archives with 10 antivirus
simultaneously, could be considered more secure, but remember that none antivirus can
assure to the 100% that a file is free of virus.