Cited by: RFC 1846
5 RFCs whose text mentions RFC 1846 (SMTP 521 Reply Code), newest first
| RFC | Title | Status | Date |
|---|---|---|---|
| 7504 | SMTP 521 and 556 Reply Codes | Proposed Standard | June 2015 |
| 6409 | Message Submission for Mail | Internet Standard | November 2011 |
| 4409 | Message Submission for Mail | Draft Standard | April 2006 |
| 3795 | Survey of IPv4 Addresses in Currently Deployed IETF Application Area Standards Track and Experimental Documents | Informational | June 2004 |
| 2476 | Message Submission | Proposed Standard | December 1998 |