RFC 822
| Section | Title | Implemented | Tests | Comments |
|---|---|---|---|---|
| 3.1.1 | Long Header Fields | 0.2 | 0.2 | |
| 3.1.2 | Structure of Header Fields | 0.2 | 0.2 | |
| 3.1.3 | Unstructured Field Bodies | 0.2 | 0.2 | |
| 3.1.4 | Structured Field Bodies | No | No | |
| 3.2 | Header Field Definitions | 0.2 | 0.2 | |
| 3.3 | Lexical Tokens | No | No | A tokenizer is not currently used. |
| 3.4.1 | Quoting | No | No | |
| 3.4.2 | White Space | No | No | |
| 3.4.3 | Comments | No | No | |
| 3.4.4 | Delimiting and Quoting Characters | No | No | |
| 3.4.5 | Quoted-Strings | No | No | |
| 3.4.6 | Bracketing Characters | No | No | |
| 3.4.7 | Case Independence | No | No | |
| 3.4.8 | Folding Long Header Fields | N/A | N/A | For text editors and terminals. |
| 3.4.9 | Backspace Characters | No | No | |
| 4.1 | Syntax | No | No | MIME support is not implemented as a regular grammar. |
| 4.3.1 | Return-Path | No | No | |
| 4.3.1 | Received | No | No | |
| 4.4.1 | From | 0.2 | 0.2 | |
| 4.4.1 | Resent-From | No | No | |
| 4.4.2 | Sender | No | No | |
| 4.4.2 | Resent-Sender | No | No | |
| 4.4.3 | Reply-To | No | No | |
| 4.4.3 | Resent-Reply-To | No | No | |
| 4.5.1 | To | No | No | |
| 4.5.1 | Resent-To | No | No | |
| 4.5.2 | CC | No | No | |
| 4.5.2 | Resent-CC | No | No | |
| 4.5.3 | BCC | No | No | |
| 4.5.3 | Resent-BCC | No | No | |
| 4.6.1 | Message-ID | No | No | |
| 4.6.1 | Resent-Message-ID | No | No | |
| 4.6.2 | In-Reply-To | No | No | |
| 4.6.3 | References | No | No | |
| 4.6.4 | Keywords | 0.10 | 0.10 | |
| 4.7.1 | Subject | 0.2 | 0.2 | |
| 4.7.2 | Comments | No | No | |
| 4.7.3 | Encrypted | No | No | |
| 4.7.4 | Extension Field | No | No | |
| 4.7.5 | User Defined Field | No | No | |
| 5.1 | Date and Time Syntax | No | No | |
| 5.2 | Date and Time Semantics | No | No | |
| 6.1 | Address Syntax | No | No | |
| 6.2 | Address Semantics | No | No |