Its a known fact that the emails we receive/ send are scanned before they reach us/intended recipient.
I thought of putting below a diagram describing how the entire stuff happens.
Lets first discuss how the entire flow works in case of Incoming Mails.
- All the incoming mails ( infected/clean) irrespective of there status are sent to the Antivirus software’s temporary folder where they are scanned for infections by the software.
- In case, the Antivirus is not able to clean the mail, the item is moved to the quarantined items folder.
- All clean/disinfected mails are then sent to the Exchange server from where they can be pulled by the Email Client.
In case of Outgoing mails, the following flow holds good.
- All mails from the Email Client are pushed to the Exchange Server.
- The mails are then moved to the Antivirus Software’s Temporary folder for scanning.
- In case, the mail is found infected and is out of the scope of clean function, its moved to the Quarantined Items Folder.
- All clean and disinfected mails are sent back to the Exchange server from where they are rolled out for the intended recipients.
Please note that this is a pseudo algorithm describing how Antivirus Softwares actually work. This might differ from software to software.
Also read: Top 3 FREE Antivirus Applications
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