我最近为我的开发团队的网站 (ironfi.st) 完成了一项任务，其中我在 apache2 Web 服务器上设置了 SMTP 邮件服务器。我使用 sendmail 以及名为 WP-MAIL-SMTP 的 WordPress SMTP 插件来完成该任务，以实现我们网站上的联系页面功能。但是，我目前面临的问题是服务器不会发送任何邮件。
我选择 sendmail 的原因之一是它的设置步骤简单。所以我很难确定我可能做错了什么。我通过 Ubuntu 连接到服务器并在其上安装了 sendmail。之后我运行配置设置，然后编辑 /etc/hosts 中的主机文件。
以下是我放入主机文件中的内容的副本： 127.0.1.1ironfi.stironfi.st 127.0.0.1 localhost localhost.localdomainironfi.st
完成此操作后，我使用我正在使用的 WP 插件附带的“发送测试电子邮件”功能测试了 SMTP 服务器。如前所述，电子邮件未发送。我开始阅读插件输出的日志。然而，这个领域不一定是我的熟练领域，所以我可能错过了日志中的一些内容，这就是为什么我附加了直接从最新的 SMTP 服务器日志文件 mail.log 从 /var/log 获取的日志和以下插件的日志文件：
来自插件的日志：
测试消息已发送
结果是：
bool(false)
The full debugging output is shown below:
object(PHPMailer)#445 (75) {
["Version"]=>
string(6) "5.2.14"
["Priority"]=>
NULL
["CharSet"]=>
string(10) "iso-8859-1"
["ContentType"]=>
string(10) "text/plain"
["Encoding"]=>
string(4) "8bit"
["ErrorInfo"]=>
string(0) ""
["From"]=>
string(14) "root@localhost"
["FromName"]=>
string(9) "Root User"
["Sender"]=>
string(0) ""
["ReturnPath"]=>
string(0) ""
["Subject"]=>
string(0) ""
["Body"]=>
string(0) ""
["AltBody"]=>
string(0) ""
["Ical"]=>
string(0) ""
["MIMEBody":protected]=>
string(0) ""
["MIMEHeader":protected]=>
string(0) ""
["mailHeader":protected]=>
string(0) ""
["WordWrap"]=>
int(0)
["Mailer"]=>
string(4) "mail"
["Sendmail"]=>
string(18) "/usr/sbin/sendmail"
["UseSendmailOptions"]=>
bool(true)
["PluginDir"]=>
string(0) ""
["ConfirmReadingTo"]=>
string(0) ""
["Hostname"]=>
string(0) ""
["MessageID"]=>
string(0) ""
["MessageDate"]=>
string(0) ""
["Host"]=>
string(9) "localhost"
["Port"]=>
int(25)
["Helo"]=>
string(0) ""
["SMTPSecure"]=>
string(0) ""
["SMTPAutoTLS"]=>
bool(true)
["SMTPAuth"]=>
bool(false)
["SMTPOptions"]=>
array(0) {
}
["Username"]=>
string(0) ""
["Password"]=>
string(0) ""
["AuthType"]=>
string(0) ""
["Realm"]=>
string(0) ""
["Workstation"]=>
string(0) ""
["Timeout"]=>
int(300)
["SMTPDebug"]=>
bool(true)
["Debugoutput"]=>
string(4) "echo"
["SMTPKeepAlive"]=>
bool(false)
["SingleTo"]=>
bool(false)
["SingleToArray"]=>
array(0) {
}
["do_verp"]=>
bool(false)
["AllowEmpty"]=>
bool(false)
["LE"]=>
string(1) "
"
["DKIM_selector"]=>
string(0) ""
["DKIM_identity"]=>
string(0) ""
["DKIM_passphrase"]=>
string(0) ""
["DKIM_domain"]=>
string(0) ""
["DKIM_private"]=>
string(0) ""
["action_function"]=>
string(0) ""
["XMailer"]=>
string(0) ""
["smtp":protected]=>
NULL
["to":protected]=>
array(0) {
}
["cc":protected]=>
array(0) {
}
["bcc":protected]=>
array(0) {
}
["ReplyTo":protected]=>
array(0) {
}
["all_recipients":protected]=>
array(0) {
}
["RecipientsQueue":protected]=>
array(0) {
}
["ReplyToQueue":protected]=>
array(0) {
}
["attachment":protected]=>
array(0) {
}
["CustomHeader":protected]=>
array(0) {
}
["lastMessageID":protected]=>
string(0) ""
["message_type":protected]=>
string(0) ""
["boundary":protected]=>
array(0) {
}
["language":protected]=>
array(0) {
}
["error_count":protected]=>
int(0)
["sign_cert_file":protected]=>
string(0) ""
["sign_key_file":protected]=>
string(0) ""
["sign_extracerts_file":protected]=>
string(0) ""
["sign_key_pass":protected]=>
string(0) ""
["exceptions":protected]=>
bool(true)
["uniqueid":protected]=>
string(0) ""
}
邮件日志：
Feb 5 10:56:28 ironfist-droplet sendmail[27655]: v15FuS0k027655: from=root, size=196, class=0, nrcpts=1, msgid=<201702051556.v15FuS0k027655@ironfist-droplet>, relay=root@localhost
Feb 5 10:56:28 ironfist-droplet sm-mta[27657]: v15FuSaG027657: ruleset=check_rcpt, arg1=<root@ironfist-droplet>, relay=localhost [127.0.0.1], reject=553 5.1.8 <root@ironfist-droplet>... Domain of sender address root@ironfist-droplet does not exist
Feb 5 10:56:28 ironfist-droplet sendmail[27655]: v15FuS0k027655: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30196, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.8, stat=User unknown
Feb 5 10:56:28 ironfist-droplet sm-mta[27657]: v15FuSaG027657: from=<root@ironfist-droplet>, size=196, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 10:56:28 ironfist-droplet sendmail[27655]: v15FuS0k027655: v15FuS0l027655: DSN: User unknown
Feb 5 10:56:28 ironfist-droplet sm-mta[27657]: v15FuSaI027657: from=<>, size=2194, class=0, nrcpts=1, msgid=<201702051556.v15FuS0l027655@ironfist-droplet>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 10:56:28 ironfist-droplet sendmail[27655]: v15FuS0l027655: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31220, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v15FuSaI027657 Message accepted for delivery)
Feb 5 10:56:28 ironfist-droplet sm-mta[27658]: v15FuSaI027657: to=<root@ironfist-droplet>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32407, dsn=2.0.0, stat=Sent
Feb 5 11:03:40 ironfist-droplet sendmail[27694]: v15G3ehZ027694: from=root, size=196, class=0, nrcpts=1, msgid=<201702051603.v15G3ehZ027694@ironfist-droplet>, relay=root@localhost
Feb 5 11:03:40 ironfist-droplet sm-mta[27696]: v15G3e0P027696: ruleset=check_rcpt, arg1=<root@ironfist-droplet>, relay=localhost [127.0.0.1], reject=553 5.1.8 <root@ironfist-droplet>... Domain of sender address root@ironfist-droplet does not exist
Feb 5 11:03:40 ironfist-droplet sendmail[27694]: v15G3ehZ027694: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30196, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.8, stat=User unknown
Feb 5 11:03:40 ironfist-droplet sm-mta[27696]: v15G3e0P027696: from=<root@ironfist-droplet>, size=196, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:03:40 ironfist-droplet sendmail[27694]: v15G3ehZ027694: v15G3eha027694: DSN: User unknown
Feb 5 11:03:40 ironfist-droplet sm-mta[27696]: v15G3e0R027696: from=<>, size=2194, class=0, nrcpts=1, msgid=<201702051603.v15G3eha027694@ironfist-droplet>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:03:40 ironfist-droplet sendmail[27694]: v15G3eha027694: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31220, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v15G3e0R027696 Message accepted for delivery)
Feb 5 11:03:40 ironfist-droplet sm-mta[27697]: v15G3e0R027696: to=<root@ironfist-droplet>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32407, dsn=2.0.0, stat=Sent
Feb 5 11:04:30 ironfist-droplet sendmail[27702]: v15G4Uxv027702: from=root, size=196, class=0, nrcpts=1, msgid=<201702051604.v15G4Uxv027702@ironfist-droplet>, relay=root@localhost
Feb 5 11:04:30 ironfist-droplet sm-mta[27704]: v15G4UL7027704: ruleset=check_rcpt, arg1=<root@ironfist-droplet>, relay=localhost [127.0.0.1], reject=553 5.1.8 <root@ironfist-droplet>... Domain of sender address root@ironfist-droplet does not exist
Feb 5 11:04:30 ironfist-droplet sendmail[27702]: v15G4Uxv027702: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30196, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.8, stat=User unknown
Feb 5 11:04:30 ironfist-droplet sm-mta[27704]: v15G4UL7027704: from=<root@ironfist-droplet>, size=196, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:04:30 ironfist-droplet sendmail[27702]: v15G4Uxv027702: v15G4Uxw027702: DSN: User unknown
Feb 5 11:04:30 ironfist-droplet sm-mta[27704]: v15G4UL9027704: from=<>, size=2194, class=0, nrcpts=1, msgid=<201702051604.v15G4Uxw027702@ironfist-droplet>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:04:30 ironfist-droplet sendmail[27702]: v15G4Uxw027702: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31220, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v15G4UL9027704 Message accepted for delivery)
Feb 5 11:04:30 ironfist-droplet sm-mta[27705]: v15G4UL9027704: to=<root@ironfist-droplet>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32407, dsn=2.0.0, stat=Sent
Feb 5 11:04:43 ironfist-droplet sendmail[27710]: v15G4hPh027710: from=root, size=196, class=0, nrcpts=1, msgid=<201702051604.v15G4hPh027710@ironfist-droplet>, relay=root@localhost
Feb 5 11:04:43 ironfist-droplet sm-mta[27712]: v15G4hZC027712: ruleset=check_rcpt, arg1=<root@ironfist-droplet>, relay=localhost [127.0.0.1], reject=553 5.1.8 <root@ironfist-droplet>... Domain of sender address root@ironfist-droplet does not exist
Feb 5 11:04:43 ironfist-droplet sendmail[27710]: v15G4hPh027710: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30196, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.8, stat=User unknown
Feb 5 11:04:43 ironfist-droplet sm-mta[27712]: v15G4hZC027712: from=<root@ironfist-droplet>, size=196, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:04:43 ironfist-droplet sendmail[27710]: v15G4hPh027710: v15G4hPi027710: DSN: User unknown
Feb 5 11:04:43 ironfist-droplet sm-mta[27712]: v15G4hZE027712: from=<>, size=2194, class=0, nrcpts=1, msgid=<201702051604.v15G4hPi027710@ironfist-droplet>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:04:43 ironfist-droplet sendmail[27710]: v15G4hPi027710: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31220, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v15G4hZE027712 Message accepted for delivery)
Feb 5 11:04:43 ironfist-droplet sm-mta[27713]: v15G4hZE027712: to=<root@ironfist-droplet>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32407, dsn=2.0.0, stat=Sent
Feb 5 11:06:52 ironfist-droplet sendmail[27722]: v15G6qmc027722: from=root, size=196, class=0, nrcpts=1, msgid=<201702051606.v15G6qmc027722@ironfist-droplet>, relay=root@localhost
Feb 5 11:06:52 ironfist-droplet sm-mta[27724]: v15G6qtl027724: ruleset=check_rcpt, arg1=<root@ironfist-droplet>, relay=localhost [127.0.0.1], reject=553 5.1.8 <root@ironfist-droplet>... Domain of sender address root@ironfist-droplet does not exist
Feb 5 11:06:52 ironfist-droplet sendmail[27722]: v15G6qmc027722: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30196, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.8, stat=User unknown
Feb 5 11:06:52 ironfist-droplet sm-mta[27724]: v15G6qtl027724: from=<root@ironfist-droplet>, size=196, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:06:52 ironfist-droplet sendmail[27722]: v15G6qmc027722: v15G6qmd027722: DSN: User unknown
Feb 5 11:06:52 ironfist-droplet sm-mta[27724]: v15G6qtn027724: from=<>, size=2194, class=0, nrcpts=1, msgid=<201702051606.v15G6qmd027722@ironfist-droplet>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:06:52 ironfist-droplet sendmail[27722]: v15G6qmd027722: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31220, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v15G6qtn027724 Message accepted for delivery)
Feb 5 11:06:52 ironfist-droplet sm-mta[27725]: v15G6qtn027724: to=<root@ironfist-droplet>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32407, dsn=2.0.0, stat=Sent
Feb 5 11:06:57 ironfist-droplet sendmail[27730]: v15G6vDO027730: from=root, size=196, class=0, nrcpts=1, msgid=<201702051606.v15G6vDO027730@ironfist-droplet>, relay=root@localhost
Feb 5 11:06:57 ironfist-droplet sm-mta[27732]: v15G6vBt027732: ruleset=check_rcpt, arg1=<root@ironfist-droplet>, relay=localhost [127.0.0.1], reject=553 5.1.8 <root@ironfist-droplet>... Domain of sender address root@ironfist-droplet does not exist
Feb 5 11:06:57 ironfist-droplet sendmail[27730]: v15G6vDO027730: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30196, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.8, stat=User unknown
Feb 5 11:06:57 ironfist-droplet sm-mta[27732]: v15G6vBt027732: from=<root@ironfist-droplet>, size=196, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:06:57 ironfist-droplet sendmail[27730]: v15G6vDO027730: v15G6vDP027730: DSN: User unknown
Feb 5 11:06:57 ironfist-droplet sm-mta[27732]: v15G6vBv027732: from=<>, size=2194, class=0, nrcpts=1, msgid=<201702051606.v15G6vDP027730@ironfist-droplet>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:06:57 ironfist-droplet sendmail[27730]: v15G6vDP027730: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31220, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v15G6vBv027732 Message accepted for delivery)
Feb 5 11:06:57 ironfist-droplet sm-mta[27733]: v15G6vBv027732: to=<root@ironfist-droplet>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32407, dsn=2.0.0, stat=Sent
Feb 5 11:08:43 ironfist-droplet sendmail[27745]: v15G8hA4027745: from=root, size=196, class=0, nrcpts=1, msgid=<201702051608.v15G8hA4027745@ironfist-droplet>, relay=root@localhost
Feb 5 11:08:43 ironfist-droplet sm-mta[27747]: v15G8hUp027747: ruleset=check_rcpt, arg1=<root@ironfist-droplet>, relay=localhost [127.0.0.1], reject=553 5.1.8 <root@ironfist-droplet>... Domain of sender address root@ironfist-droplet does not exist
Feb 5 11:08:43 ironfist-droplet sendmail[27745]: v15G8hA4027745: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30196, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.8, stat=User unknown
Feb 5 11:08:43 ironfist-droplet sm-mta[27747]: v15G8hUp027747: from=<root@ironfist-droplet>, size=196, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:08:43 ironfist-droplet sendmail[27745]: v15G8hA4027745: v15G8hA5027745: DSN: User unknown
Feb 5 11:08:43 ironfist-droplet sm-mta[27747]: v15G8hUr027747: from=<>, size=2194, class=0, nrcpts=1, msgid=<201702051608.v15G8hA5027745@ironfist-droplet>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:08:43 ironfist-droplet sendmail[27745]: v15G8hA5027745: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31220, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v15G8hUr027747 Message accepted for delivery)
Feb 5 11:08:43 ironfist-droplet sm-mta[27748]: v15G8hUr027747: to=<root@ironfist-droplet>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32407, dsn=2.0.0, stat=Sent
Feb 5 11:09:30 ironfist-droplet sendmail[27772]: v15G9U0s027772: from=root, size=196, class=0, nrcpts=1, msgid=<201702051609.v15G9U0s027772@ironfist-droplet>, relay=root@localhost
Feb 5 11:09:30 ironfist-droplet sm-mta[27774]: v15G9UTw027774: ruleset=check_rcpt, arg1=<root@ironfist-droplet>, relay=localhost [127.0.0.1], reject=553 5.1.8 <root@ironfist-droplet>... Domain of sender address root@ironfist-droplet does not exist
Feb 5 11:09:30 ironfist-droplet sendmail[27772]: v15G9U0s027772: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30196, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.8, stat=User unknown
Feb 5 11:09:30 ironfist-droplet sm-mta[27774]: v15G9UTw027774: from=<root@ironfist-droplet>, size=196, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:09:30 ironfist-droplet sendmail[27772]: v15G9U0s027772: v15G9U0t027772: DSN: User unknown
Feb 5 11:09:30 ironfist-droplet sm-mta[27774]: v15G9UU0027774: from=<>, size=2194, class=0, nrcpts=1, msgid=<201702051609.v15G9U0t027772@ironfist-droplet>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 11:09:30 ironfist-droplet sendmail[27772]: v15G9U0t027772: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31220, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v15G9UU0027774 Message accepted for delivery)
Feb 5 11:09:30 ironfist-droplet sm-mta[27775]: v15G9UU0027774: to=<root@ironfist-droplet>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32407, dsn=2.0.0, stat=Sent
Feb 5 15:34:09 ironfist-droplet sendmail[29166]: v15KY9ME029166: from=root, size=196, class=0, nrcpts=1, msgid=<201702052034.v15KY9ME029166@ironfist-droplet>, relay=root@localhost
Feb 5 15:34:09 ironfist-droplet sm-mta[29168]: v15KY9Bg029168: ruleset=check_rcpt, arg1=<root@ironfist-droplet>, relay=localhost [127.0.0.1], reject=553 5.1.8 <root@ironfist-droplet>... Domain of sender address root@ironfist-droplet does not exist
Feb 5 15:34:09 ironfist-droplet sendmail[29166]: v15KY9ME029166: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30196, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.8, stat=User unknown
Feb 5 15:34:09 ironfist-droplet sm-mta[29168]: v15KY9Bg029168: from=<root@ironfist-droplet>, size=196, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 15:34:09 ironfist-droplet sendmail[29166]: v15KY9ME029166: v15KY9MF029166: DSN: User unknown
Feb 5 15:34:09 ironfist-droplet sm-mta[29168]: v15KY9Bi029168: from=<>, size=2194, class=0, nrcpts=1, msgid=<201702052034.v15KY9MF029166@ironfist-droplet>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 15:34:09 ironfist-droplet sendmail[29166]: v15KY9MF029166: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31220, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v15KY9Bi029168 Message accepted for delivery)
Feb 5 15:34:09 ironfist-droplet sm-mta[29169]: v15KY9Bi029168: to=<root@ironfist-droplet>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32407, dsn=2.0.0, stat=Sent
Feb 5 15:34:59 ironfist-droplet sendmail[29179]: v15KYxAq029179: from=root, size=196, class=0, nrcpts=1, msgid=<201702052034.v15KYxAq029179@ironfist-droplet>, relay=root@localhost
Feb 5 15:34:59 ironfist-droplet sm-mta[29181]: v15KYx21029181: ruleset=check_rcpt, arg1=<root@ironfist-droplet>, relay=localhost [127.0.0.1], reject=553 5.1.8 <root@ironfist-droplet>... Domain of sender address root@ironfist-droplet does not exist
Feb 5 15:34:59 ironfist-droplet sendmail[29179]: v15KYxAq029179: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30196, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.8, stat=User unknown
Feb 5 15:34:59 ironfist-droplet sm-mta[29181]: v15KYx21029181: from=<root@ironfist-droplet>, size=196, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 15:34:59 ironfist-droplet sendmail[29179]: v15KYxAq029179: v15KYxAr029179: DSN: User unknown
Feb 5 15:34:59 ironfist-droplet sm-mta[29181]: v15KYx23029181: from=<>, size=2194, class=0, nrcpts=1, msgid=<201702052034.v15KYxAr029179@ironfist-droplet>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 15:34:59 ironfist-droplet sendmail[29179]: v15KYxAr029179: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31220, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v15KYx23029181 Message accepted for delivery)
Feb 5 15:34:59 ironfist-droplet sm-mta[29182]: v15KYx23029181: to=<root@ironfist-droplet>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32407, dsn=2.0.0, stat=Sent
Feb 5 15:35:24 ironfist-droplet sendmail[29189]: v15KZNKB029189: from=root, size=196, class=0, nrcpts=1, msgid=<201702052035.v15KZNKB029189@ironfist-droplet>, relay=root@localhost
Feb 5 15:35:24 ironfist-droplet sm-mta[29191]: v15KZOSx029191: ruleset=check_rcpt, arg1=<root@ironfist-droplet>, relay=localhost [127.0.0.1], reject=553 5.1.8 <root@ironfist-droplet>... Domain of sender address root@ironfist-droplet does not exist
Feb 5 15:35:24 ironfist-droplet sendmail[29189]: v15KZNKB029189: to=root, ctladdr=root (0/0), delay=00:00:01, xdelay=00:00:00, mailer=relay, pri=30196, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.8, stat=User unknown
Feb 5 15:35:24 ironfist-droplet sm-mta[29191]: v15KZOSx029191: from=<root@ironfist-droplet>, size=196, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 15:35:24 ironfist-droplet sendmail[29189]: v15KZNKB029189: v15KZNKC029189: DSN: User unknown
Feb 5 15:35:24 ironfist-droplet sm-mta[29191]: v15KZOT1029191: from=<>, size=2194, class=0, nrcpts=1, msgid=<201702052035.v15KZNKC029189@ironfist-droplet>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 15:35:24 ironfist-droplet sendmail[29189]: v15KZNKC029189: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31220, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v15KZOT1029191 Message accepted for delivery)
Feb 5 15:35:24 ironfist-droplet sm-mta[29192]: v15KZOT1029191: to=<root@ironfist-droplet>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32407, dsn=2.0.0, stat=Sent
Feb 5 15:35:34 ironfist-droplet sendmail[29199]: v15KZYoU029199: from=root, size=196, class=0, nrcpts=1, msgid=<201702052035.v15KZYoU029199@ironfist-droplet>, relay=root@localhost
Feb 5 15:35:34 ironfist-droplet sm-mta[29201]: v15KZYQ4029201: ruleset=check_rcpt, arg1=<root@ironfist-droplet>, relay=localhost [127.0.0.1], reject=553 5.1.8 <root@ironfist-droplet>... Domain of sender address root@ironfist-droplet does not exist
Feb 5 15:35:34 ironfist-droplet sendmail[29199]: v15KZYoU029199: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30196, relay=[127.0.0.1] [127.0.0.1], dsn=5.1.8, stat=User unknown
Feb 5 15:35:34 ironfist-droplet sm-mta[29201]: v15KZYQ4029201: from=<root@ironfist-droplet>, size=196, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 15:35:34 ironfist-droplet sendmail[29199]: v15KZYoU029199: v15KZYoV029199: DSN: User unknown
Feb 5 15:35:34 ironfist-droplet sm-mta[29201]: v15KZYQ6029201: from=<>, size=2194, class=0, nrcpts=1, msgid=<201702052035.v15KZYoV029199@ironfist-droplet>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
Feb 5 15:35:34 ironfist-droplet sendmail[29199]: v15KZYoV029199: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31220, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (v15KZYQ6029201 Message accepted for delivery)
Feb 5 15:35:34 ironfist-droplet sm-mta[29202]: v15KZYQ6029201: to=<root@ironfist-droplet>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32407, dsn=2.0.0, stat=Sent
如果有人在日志中发现任何可能有帮助的内容，请随时告诉我。我仍在进行研究并试图找出可能出现的问题并查看日志，但是，由于我在这方面不太熟练，因此感谢任何形式的所有帮助。
Mail.err.1日志：
Jan 24 23:21:47 ironfist-droplet sendmail[2417]: My unqualified host name (ironfist-droplet) unknown; sleeping for retry
Jan 24 23:22:47 ironfist-droplet sendmail[2417]: unable to qualify my own domain name (ironfist-droplet) -- using short name
Jan 24 23:22:47 ironfist-droplet sm-mta[2486]: My unqualified host name (ironfist-droplet) unknown; sleeping for retry
Jan 24 23:22:50 ironfist-droplet sm-msp-queue[2491]: My unqualified host name (ironfist-droplet) unknown; sleeping for retry
Jan 24 23:23:47 ironfist-droplet sm-mta[2486]: unable to qualify my own domain name (ironfist-droplet) -- using short name
Jan 24 23:23:50 ironfist-droplet sm-msp-queue[2491]: unable to qualify my own domain name (ironfist-droplet) -- using short name
谢谢。
答案1
sendmail自从我与和合作以来已经很长时间了postfix，因此我无法为您的 MTA 配置提供合格的建议。
据我所知，您的互联网域名是ironfi.st（请参阅which ironfi.st），这也是从互联网访问时的 HTTP 服务器名称 ( host ironfi.st)，（至少）有一个附加名称/别名为www.ironfi.st。
还有一个 MX 记录ironfi.st，指向该mx-caprica.easydns.com地址，以便邮件可以投递到该地址[email protected]。这些信息都可以通过查询 DNS 公开获得。
我不太确定的是你的本地网络/服务器的组织，因为我假设你的服务器位于使用 NAS 的路由器后面，其中一些端口传递到你的服务器（其他任何东西都会非常不安全）。因此，您的主机应该具有环回网络 (127.0.0.x) 和至少一个其他专用网络来连接到路由器。这里和下面我假设你的apache服务器是基于Linux操作系统的，我只参考配置IPV4。
乍一看奇怪的是你的/etc/hosts。它通常默认为类似的东西
127.0.0.1 localhost
<privateIP> <hostname> <hostname.domainname>
从你的情况来看mail.log，我想你的主机名是ironfist-droplet；我不知道你的 DNS 域名是否已设置。您可以使用hostname -f和检查这一点dnsdomainname。假设你的私有IP是192.168.1.10（只是一个假设！）并hostname -f返回ironfist-droplet.ironfi.st，第二行应该是
192.168.1.10 ironfist-droplet ironfist-droplet.ironfi.st
为了完整起见，你可能有
192.168.1.10 ironfist-droplet ironfist-droplet.ironfi.st ironfi.st
现在你可以测试
ping localhost
ping ironfist-droplet
ping ironfist-droplet.ironfi.st
ping ironfi.st
它应该返回正确的 IP 并且没有数据包丢失。
现在到您的条目mail.log：
您正在通过中继从root到root（不知道为什么）发送邮件root@localhost。然后，发件人将被编码为root@ironfist-droplet，这将被拒绝作为发件人地址的域does not exist。有一封中继返回from <>的邮件，投递了什么；我认为这是 MTA 向发件人发出的邮件无法发送的消息。使用或或类似的其他程序查看 root 的本地邮箱。root@ironfist-dropletlocalhostmailxs-nail
你应该彻底反映你的插件的配置WP-MAIL-SMTP（谁是发件人，谁是收件人）和你的sendmail（它负责什么域，允许哪些发件人发送邮件，将邮件转发到哪里）。正如我所说，我无法在这里提供建议。例如，如果您希望将邮件发送给[email protected]您，则应该使用有效的发件人进行配置；仅仅从 到root并不是root一个好主意。
看看/var/log/mail.err是否存在，也许还有更多提示。它通常只包含错误消息，但mail.log也包含成功消息。