"Doe, John" , "Roe, Jane" #### +----------------+--------+------------+----------------------------+ | Field | Min | Max number | Notes | | | number | | | +----------------+--------+------------+----------------------------+ | trace | 0 | unlimited | Block prepended - see | | | | | 3.6.7 | | resent-date | 0* | unlimited* | One per block, required if | | | | | other resent fields are | | | | | present - see 3.6.6 | | resent-from | 0 | unlimited* | One per block - see 3.6.6 | | resent-sender | 0* | unlimited* | One per block, MUST occur | | | | | with multi-address | | | | | resent-from - see 3.6.6 | | resent-to | 0 | unlimited* | One per block - see 3.6.6 | | resent-cc | 0 | unlimited* | One per block - see 3.6.6 | | resent-bcc | 0 | unlimited* | One per block - see 3.6.6 | | resent-msg-id | 0 | unlimited* | One per block - see 3.6.6 | | orig-date | 1 | 1 | | | from | 1 | 1 | See sender and 3.6.2 | | sender | 0* | 1 | MUST occur with | | | | | multi-address from - see | | | | | 3.6.2 | | reply-to | 0 | 1 | | | to | 0 | 1 | | | cc | 0 | 1 | | | bcc | 0 | 1 | | | message-id | 0* | 1 | SHOULD be present - see | | | | | 3.6.4 | | in-reply-to | 0* | 1 | SHOULD occur in some | | | | | replies - see 3.6.4 | | references | 0* | 1 | SHOULD occur in some | | | | | replies - see 3.6.4 | | subject | 0 | 1 | | | comments | 0 | unlimited | | | keywords | 0 | unlimited | | | optional-field | 0 | unlimited | | +----------------+--------+------------+----------------------------+