Search filters this STIG's checks locally. Separate terms must all match (use quotes for an exact phrase). A search you ran on the Search page carries over here.
Assessment Title
Rule Text
Exchange nonexistent recipients must not be blocked.
Description
Discussion Text
Spam originators, in an effort to refine mailing lists, sometimes use a technique where they first create fictitious names and then monitor rejected emails for non-existent recipients. Those not rejected are deemed to exist and are used in future spam mailings.
To prevent this disclosure of existing email accounts to spammers, email to nonexistent recipients must not be blocked. Instead, it is recommended that all messages be received, then evaluated and disposed of without enabling the sender to determine existent vs. nonexistent recipients.
To prevent this disclosure of existing email accounts to spammers, email to nonexistent recipients must not be blocked. Instead, it is recommended that all messages be received, then evaluated and disposed of without enabling the sender to determine existent vs. nonexistent recipients.
New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.