The system will generate a SHA1 hash based on the attached file and check this hash via a DNS lookup against the SMEOptimizer DNS server. If there is a match (A record), then the TXT record for this key provides a SHA256 and a filesize as well as Virus/Malware description. The SHA256 and size will be used to double verify the match and the description to provide a proper reject message in the qpsmtpd plugin. | The system will generate a SHA1 hash based on the attached file and check this hash via a DNS lookup against the SMEOptimizer DNS server. If there is a match (A record), then the TXT record for this key provides a SHA256 and a filesize as well as Virus/Malware description. The SHA256 and size will be used to double verify the match and the description to provide a proper reject message in the qpsmtpd plugin. |