sendmail, 4th Edition

Recipient Headers

Recipient headers are those from which one or more recipients can be parsed. Addresses in headers with the H_RCPT flag (H_RCPT Header Flag (V5 and Later) on page 1141) are rewritten as recipient addresses. When sendmail is invoked with the -t command-line switch, it gathers a list of recipients from all the headers marked with an H_RCPT flag and delivers a copy of the message to each.

The list of recipient headers used by sendmail is shown in Table 25-7.

Table 25-7. Recipient headers

Header	§	Flags	Defined by
To:	To: on page 1167	H_RCPT	RFC2822
Resent-To:	Forwarding with Re-Sent Headers on page 1147	H_RCPT, H_RESENT	RFC2822
Cc:	Cc: on page 1152	H_RCPT	RFC2822
Resent-Cc:	Forwarding with Re-Sent Headers on page 1147	H_RCPT, H_RESENT	RFC2822
Bcc:	Bcc: on page 1152	H_RCPT, H_BCC	RFC2822
Resent-Bcc:	Forwarding with Re-Sent Headers on page 1147	H_RCPT, H_BCC,H_RESENT	RFC2822
Apparently-To:	Apparently-To: on page 1151	H_RCPT	Obsolete