In the last few days we have received "SMTP MAIL UNDELIVERED" emails, all with a mail.zip,letter.zip,attachment.zip attachment claimed to be the text of an undeliverable mail. This is a virus which Clamwin was not able to detect. Kindly provide the necessary virus definitions for the same.

Please submit a sample of all viruses that are not detected by ClamWin (and also any false positive detections) to Clam AV starting at https://www.clamav.net/lang/en/sendvirus/ on the web. They need the actual file that contains the virus to prepare a signature. Clam AV furnishes the scanning engine and virus signatures used by ClamWin and they are responsible for virus signatures. ClamWin will get the signatures when they are released by Clam AV.

Regards,