Postfix扫描邮件结果Action
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邮件经过垃圾邮件扫描器扫描后，接收返回结果，进行相应的action。返回结果如下：
SMFIR_PROGRESS
/* * Still working on it. * 仍在努力(正在处理) */case SMFIR_PROGRESS: if (data_size != 0) break; continue;SMFIR_CONTINUE
/* * Decision: continue processing. * 决定：继续处理 */case SMFIR_CONTINUE: if (data_size != 0) break; MILTER8_EVENT_BREAK(milter->def_reply);SMFIR_ACCEPT
/* * Decision: accept this message, or accept all further commands * in this SMTP connection. This decision is final (i.e. Sendmail * 8 changes receiver state). * 决定：接受此消息，或接受此SMTP连接中的所有其他命令。 该决定是 * 最终的（即Sendmail 8改变接收器状态）。 */case SMFIR_ACCEPT: if (data_size != 0) break; if (IN_CONNECT_EVENT(event)) {#ifdef LIBMILTER_AUTO_DISCONNECT milter8_close_stream(milter);#endif /* No more events for this SMTP connection. */ milter->state = MILTER8_STAT_ACCEPT_CON; } else { /* No more events for this message. */ milter->state = MILTER8_STAT_ACCEPT_MSG; } MILTER8_EVENT_BREAK(milter->def_reply);SMFIR_DISCARD
/** Decision: accept and silently discard this message. According * to the milter API documentation there will be no action when * this is requested by a connection-level function. This * decision is final (i.e. Sendmail 8 changes receiver state). * 决策:接受并悄悄地丢弃此消息。根据milter API文档，当一个连接级别 * 的函数请求它时，不会有任何动作。这个决定是最终的(即Sendmail 8改 * 变接收者状态)。 */case SMFIR_DISCARD: if (data_size != 0) break; if (IN_CONNECT_EVENT(event)) { msg_warn("milter %s: DISCARD action is not allowed " "for connect or helo", milter->m.name); MILTER8_EVENT_BREAK(milter->def_reply); } else { /* No more events for this message. */ milter->state = MILTER8_STAT_ACCEPT_MSG; MILTER8_EVENT_BREAK("D"); }SMFIR_REJECT
/* * Decision: reject connection, message or recipient. This * decision is final (i.e. Sendmail 8 changes receiver state). * 决策:拒绝连接、消息或接收方。这个决定是最终的(即Sendmail 8 * 改变接收者状态)。 */case SMFIR_REJECT: if (data_size != 0) break; if (IN_CONNECT_EVENT(event)) {#ifdef LIBMILTER_AUTO_DISCONNECT milter8_close_stream(milter);#endif milter->state = MILTER8_STAT_REJECT_CON; MILTER8_EVENT_BREAK(milter8_def_reply(milter, "550 5.7.1 Command rejected")); } else { MILTER8_EVENT_BREAK("550 5.7.1 Command rejected"); }SMFIR_TEMPFAIL
/* * Decision: tempfail. This decision is final (i.e. Sendmail 8 * changes receiver state). * 决定:临时失败。这个决定是最终的(即Sendmail 8改变接收者状态)。 */case SMFIR_TEMPFAIL: if (data_size != 0) break; if (IN_CONNECT_EVENT(event)) {#ifdef LIBMILTER_AUTO_DISCONNECT milter8_close_stream(milter);#endif milter->state = MILTER8_STAT_REJECT_CON; MILTER8_EVENT_BREAK(milter8_def_reply(milter, "451 4.7.1 Service unavailable - try again later")); } else { MILTER8_EVENT_BREAK("451 4.7.1 Service unavailable - try again later"); }SMFIR_SHUTDOWN
/* * Decision: disconnect. This decision is final (i.e. Sendmail 8 * changes receiver state). * 决定:断开连接。这个决定是最终的(即Sendmail 8改变接收者状态)。 */case SMFIR_SHUTDOWN: if (data_size != 0) break;#ifdef LIBMILTER_AUTO_DISCONNECT milter8_close_stream(milter);#endif milter->state = MILTER8_STAT_REJECT_CON; MILTER8_EVENT_BREAK(milter8_def_reply(milter, "S"));SMFIR_REPLYCODE
/* * Decision: "ddd d.d+.d+ text". This decision is final (i.e. * Sendmail 8 changes receiver state). Note: the reply may be in * multi-line SMTP format. * * XXX Sendmail compatibility: sendmail 8 uses the reply as a format * string; therefore any '%' characters in the reply are doubled. * Postfix doesn't use replies as format strings; we replace '%%' * by '%', and remove single (i.e. invalid) '%' characters. * XXX Sendmail兼容性：sendmail 8使用回复作为格式字符串; 因此，答复中 * 的任何'％'字符都翻了一番。 Postfix不使用回复作为格式字符串; 我们用 * '％'替换'%%'，并删除单个（即无效）'％'字符。 */case SMFIR_REPLYCODE: if (milter8_read_data(milter, &data_size, MILTER8_DATA_BUFFER, milter->buf, MILTER8_DATA_END) != 0) MILTER8_EVENT_BREAK(milter->def_reply); /* XXX Enforce this for each line of a multi-line reply. */ if ((STR(milter->buf)[0] != '4' && STR(milter->buf)[0] != '5') || !ISDIGIT(STR(milter->buf)[1]) || !ISDIGIT(STR(milter->buf)[2]) || (STR(milter->buf)[3] != ' ' && STR(milter->buf)[3] != '-') || (ISDIGIT(STR(milter->buf)[4]) && (STR(milter->buf)[4] != STR(milter->buf)[0]))) { msg_warn("milter %s: malformed reply: %s", milter->m.name, STR(milter->buf)); milter8_conf_error(milter); MILTER8_EVENT_BREAK(milter->def_reply); } if ((rp = cp = strchr(STR(milter->buf), '%')) != 0) { for (;;) { if ((ch = *cp++) == '%') ch = *cp++; *rp++ = ch; if (ch == 0) break; } } if (var_soft_bounce) { for (cp = STR(milter->buf); /* void */ ; cp = next) { if (cp[0] == '5') { cp[0] = '4'; if (cp[4] == '5') cp[4] = '4'; } if ((next = strstr(cp, "\r\n")) == 0) break; next += 2; } } if (IN_CONNECT_EVENT(event)) {#ifdef LIBMILTER_AUTO_DISCONNECT milter8_close_stream(milter);#endif milter->state = MILTER8_STAT_REJECT_CON; MILTER8_EVENT_BREAK(milter8_def_reply(milter, STR(milter->buf))); } else { MILTER8_EVENT_BREAK(STR(milter->buf)); }SMFIR_QUARANTINE
/* * Decision: quarantine. In Sendmail 8.13 this does not imply a * transition in the receiver state (reply, reject, tempfail, * accept, discard). We should not transition, either, otherwise * we get out of sync. * 决定:隔离。在Sendmail 8.13中，这并不意味着接收方状态的转换(应 * 答、拒绝、tempfail、accept、丢弃)。我们也不应该过渡，否则我们就会失去同步。 */case SMFIR_QUARANTINE: /* XXX What to do with the "reason" text? */ if (milter8_read_data(milter, &data_size, MILTER8_DATA_BUFFER, milter->buf, MILTER8_DATA_END) != 0) MILTER8_EVENT_BREAK(milter->def_reply); milter8_def_reply(milter, "H"); continue;SMFIR_SKIP
/* * Decision: skip further events of this type. * 决策:跳过这类的进一步事件。 */case SMFIR_SKIP: if (data_size != 0) break; milter->skip_event_type = event; MILTER8_EVENT_BREAK(milter->def_reply);SMFIR_CHGHEADER
/* * Modification request: replace, insert or delete * header. Index 1 means the first instance. * 修改请求:替换、插入或删除消息头。索引1表示第一个实例。 */case SMFIR_CHGHEADER: if (milter8_read_data(milter, &data_size, MILTER8_DATA_HLONG, &index, MILTER8_DATA_STRING, milter->buf, MILTER8_DATA_STRING, milter->body, MILTER8_DATA_END) != 0) MILTER8_EVENT_BREAK(milter->def_reply); /* Skip to the next request after previous edit error. */ if (edit_resp) continue; /* XXX Sendmail 8 compatibility. */ if (index == 0) index = 1; if ((ssize_t) index < 1) { msg_warn("milter %s: bad change header index: %ld", milter->m.name, (long) index); milter8_conf_error(milter); MILTER8_EVENT_BREAK(milter->def_reply); } if (LEN(milter->buf) == 0) { msg_warn("milter %s: null change header name", milter->m.name); milter8_conf_error(milter); MILTER8_EVENT_BREAK(milter->def_reply); } if (STR(milter->body)[0]) edit_resp = parent->upd_header(parent->chg_context, (ssize_t) index, STR(milter->buf), MILTER8_HDR_SPACE(milter), STR(milter->body)); else edit_resp = parent->del_header(parent->chg_context, (ssize_t) index, STR(milter->buf)); continue;SMFIR_ADDHEADER
/* * Modification request: append header. * 修改要求:附加头。 */case SMFIR_ADDHEADER: if (milter8_read_data(milter, &data_size, MILTER8_DATA_STRING, milter->buf, MILTER8_DATA_STRING, milter->body, MILTER8_DATA_END) != 0) MILTER8_EVENT_BREAK(milter->def_reply); /* Skip to the next request after previous edit error. */ if (edit_resp) continue; edit_resp = parent->add_header(parent->chg_context, STR(milter->buf), MILTER8_HDR_SPACE(milter), STR(milter->body)); continue;SMFIR_INSHEADER
/* * Modification request: insert header. With Sendmail 8, * index 0 means the top-most header. We use 1-based * indexing for consistency with header change * operations. */case SMFIR_INSHEADER: if (milter8_read_data(milter, &data_size, MILTER8_DATA_HLONG, &index, MILTER8_DATA_STRING, milter->buf, MILTER8_DATA_STRING, milter->body, MILTER8_DATA_END) != 0) MILTER8_EVENT_BREAK(milter->def_reply); /* Skip to the next request after previous edit error. */ if (edit_resp) continue; if ((ssize_t) index + 1 < 1) { msg_warn("milter %s: bad insert header index: %ld", milter->m.name, (long) index); milter8_conf_error(milter); MILTER8_EVENT_BREAK(milter->def_reply); } edit_resp = parent->ins_header(parent->chg_context, (ssize_t) index + 1, STR(milter->buf), MILTER8_HDR_SPACE(milter), STR(milter->body)); continue;SMFIR_CHGFROM
/* * Modification request: replace sender, with optional * ESMTP args. */case SMFIR_CHGFROM: if (milter8_read_data(milter, &data_size, MILTER8_DATA_STRING, milter->buf, MILTER8_DATA_MORE) != 0) MILTER8_EVENT_BREAK(milter->def_reply); if (data_size > 0) { if (milter8_read_data(milter, &data_size, MILTER8_DATA_STRING, milter->body, MILTER8_DATA_END) != 0) MILTER8_EVENT_BREAK(milter->def_reply); } else { VSTRING_RESET(milter->body); VSTRING_TERMINATE(milter->body); } /* Skip to the next request after previous edit error. */ if (edit_resp) continue; edit_resp = parent->chg_from(parent->chg_context, STR(milter->buf), STR(milter->body)); continue;SMFIR_ADDRCPT
/* * Modification request: append recipient. */case SMFIR_ADDRCPT: if (milter8_read_data(milter, &data_size, MILTER8_DATA_STRING, milter->buf, MILTER8_DATA_END) != 0) MILTER8_EVENT_BREAK(milter->def_reply); /* Skip to the next request after previous edit error. */ if (edit_resp) continue; edit_resp = parent->add_rcpt(parent->chg_context, STR(milter->buf)); continue;SMFIR_ADDRCPT_PAR
/* * Modification request: append recipient, with optional * ESMTP args. */case SMFIR_ADDRCPT_PAR: if (milter8_read_data(milter, &data_size, MILTER8_DATA_STRING, milter->buf, MILTER8_DATA_MORE) != 0) MILTER8_EVENT_BREAK(milter->def_reply); if (data_size > 0) { if (milter8_read_data(milter, &data_size, MILTER8_DATA_STRING, milter->body, MILTER8_DATA_END) != 0) MILTER8_EVENT_BREAK(milter->def_reply); } else { VSTRING_RESET(milter->body); VSTRING_TERMINATE(milter->body); } /* Skip to the next request after previous edit error. */ if (edit_resp) continue; edit_resp = parent->add_rcpt_par(parent->chg_context, STR(milter->buf), STR(milter->body)); continue;SMFIR_DELRCPT
/* * Modification request: delete (expansion of) recipient. */case SMFIR_DELRCPT: if (milter8_read_data(milter, &data_size, MILTER8_DATA_STRING, milter->buf, MILTER8_DATA_END) != 0) MILTER8_EVENT_BREAK(milter->def_reply); /* Skip to the next request after previous edit error. */ if (edit_resp) continue; edit_resp = parent->del_rcpt(parent->chg_context, STR(milter->buf)); continue;SMFIR_REPLBODY
/* * Modification request: replace the message body, and * update the message size. */case SMFIR_REPLBODY: if (body_edit_lockout) { msg_warn("milter %s: body replacement requests can't " "currently be mixed with other requests", milter->m.name); milter8_conf_error(milter); MILTER8_EVENT_BREAK(milter->def_reply); } if (milter8_read_data(milter, &data_size, MILTER8_DATA_BUFFER, milter->body, MILTER8_DATA_END) != 0) MILTER8_EVENT_BREAK(milter->def_reply); /* Skip to the next request after previous edit error. */ if (edit_resp) continue; /* Start body replacement. */ if (body_line_buf == 0) { body_line_buf = vstring_alloc(var_line_limit); edit_resp = parent->repl_body(parent->chg_context, MILTER_BODY_START, (VSTRING *) 0); } /* Extract lines from the on-the-wire CRLF format. */ for (cp = STR(milter->body); edit_resp == 0 && cp < vstring_end(milter->body); cp++) { ch = *(unsigned char *) cp; if (ch == '\n') { if (LEN(body_line_buf) > 0 && vstring_end(body_line_buf)[-1] == '\r') vstring_truncate(body_line_buf, LEN(body_line_buf) - 1); edit_resp = parent->repl_body(parent->chg_context, MILTER_BODY_LINE, body_line_buf); VSTRING_RESET(body_line_buf); } else { VSTRING_ADDCH(body_line_buf, ch); } } continue;
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