Fixing "440 Posting Failed" Error in Usenet Posting

When attempting to post on Usenet, encountering the error message "440 posting failed: header not in Internet syntax" indicates an issue with the email address format in your posting software's settings. To resolve this, ensure that your software uses a properly formatted email address. The address doesn't need to be valid, but it must adhere to standard formatting conventions. For example, using "username@domain.tld" would be appropriate.​