The SecureMailFlow service in Mithi Skyconnect is designed to protect your inbox from spam and virus mails. It also helps prevent your recipients from receiving spam mail, which you may send inadvertently. This service sits in the inbound and outbound mail flow path and ensures that every mail which you receive from the Internet is scanned for spam and virus. Any mail detected as a spam/virus as per the rules and policies defined in the SecureMailFlow service is either rejected or quarantined into a separate storage per domain. The SecureMailFlow service is an integral part of the Mithi SkyConnect service for all our customers and is configured to scan all inbound mail and outbound mail.
Working of the Inbound Mail flow
The MX pointers for our customers' domains point to the SecureMailFlow servers, such that all inbound mail traffic (from the Internet) for the domains lands on these servers. After determining the reputation and technical cleanliness of the source of connection for the mail, these servers first scan the mail for containing any virus. If the mail contains a virus, it is simply quarantined, with no further scanning. This action applies (overrules) even if the sender is whitelisted. Once the mail passes the virus stage, and the sender is not whitelisted or blacklisted, it's content and attachments are scanned for objectionable "patterns" and if found, the mail is marked as spam and quarantined.
Working of the Outbound Mail flow
Any mail sent by any user of our customer (outbound), is not scanned for spam. The outbound mail scanning is enabled for the domain on request. If enabled all outgoing emails are scanned for viruses. If any virus infection is detected, the mail is simply quarantined.
The quarantine store can be managed by the administrators of our customers. They get access to the Quarantine management console of SecureMailFlow, from where they can search for and release specific mail if required. Accessing this console is primarily required to seek out false positives (a mail that was actually a clean mail but got detected as spam) and release them to the end-users.