[400]

Service discontinued

[411]

No such newsgroup

[412]

No newsgroup has been selected

[418]

No tin-style index is available

[420]

No current article has been selected

[421]

No next article in this group

[422]

No previous article in this group

[423]

No such article number in this group

[430]

No such article found

[435]

Article not wanted - do not send it

[436]

Transfer failed - try again later

[437]

Article rejected - do not try again

[440]

Posting not allowed

[441]

Posting failed

[480]

Authentication required

[482]

Authentication rejected

[500]

Command not recognized

[501]

Command syntax error

[502]

Permission denied

[503]

Program error