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Email Delivery Flowchart SPAM Filter

Does the mailbox exist?

Send rejections notification (no such user, mailbox does not exist, etc.)

NO

YES

Scan for viruses Disgard the email

Does it contain a virus?

Check SPAM filter Whitelist

Deliver to Exchange server

YES

NO

Does it contain malware? s Is it on the Whitelist?

NO

YES

Mailbox Check SPAM filter Blacklist

YES

NO

Mailbox

Mailbox Is it on the Blacklist?

Mailbox

Mailbox

Scan and Score the email

YES

NO

Is message marked as SPAM? Scan Score = 0 - 3.4 Scan Score = 3.5- 4.9

YES

NO

Scan Score = 5.0 or >

Is Automatic junk email filter on?

Tag as SPAM by inserting a ~ symbol at the beginning of the Subject line

YES

NO

Deliver to Inbox

Deliver to Junk E-mail folder


Email Delivery Flow Chart