Extension support status #248
Description
List of all extensions: https://www.iana.org/assignments/mail-parameters/mail-parameters.xhtml#mail-parameters-2
| Extension | RFC | Client | Server |
|---|---|---|---|
| ESMTP | 5321 | ✓ | ✓ |
| LMTP | 2033 | ✓ | ✓ |
| 8BITMIME | 6152 | ✓ | ✓ |
| SIZE | 1870 | ✓ | ✓ |
| CHUNKING | 3030 | ✗ | ✓ |
| BINARYMIME | 3030 | ✗ | ✓ |
| CHECKPOINT | 1845 | ✗ | ✗ |
| DELIVERBY | 2852 | ✓ | ✓ |
| PIPELINING | 2920 | ✗ | ✓ |
| DSN | 3461 | ✓ | ✓ |
| ETRN | 1985 | ✗ | ✗ |
| ENHANCEDSTATUSCODES | 2034 | ✓ | ✓ |
| STARTTLS | 3207 | ✓ | ✓ |
| NO-SOLICITING | 3865 | ✗ | ✗ |
| MTRK | 3885 | ✗ | ✗ |
| ATRN | 2645 | ✗ | ✗ |
| AUTH | 4954 | ✓ | ✓ |
| BURL | 4468 | ✗ | ✗ |
| FUTURERELEASE | 4865 | ✗ | ✗ |
| CONPERM | 4141 | ✗ | ✗ |
| CONNEG | 4141 | ✗ | ✗ |
| SMTPUTF8 | 6531 | ✓ | ✓ |
| MT-PRIORITY | 6710 | ✓ | ✓ |
| RRVS | 7293 | ✓ | ✓ |
| REQUIRETLS | 8689 | ✓ | ✓ |
| LIMITS | 9422 | ✗ | ✗ |