# 发送到自定义地址的电子邮件失败："与EHLO后连接丢失" **URL:** \ **Category:** Support\ **Tags:** email\ **Created:** [2024年十月30日 07:12 UTC](https://meta.discourse.org/t/email-to-custom-address-fails-lost-connection-after-ehlo/333553 "2024-10-30T07:12:32Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![ToddZ](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/toddz/32/328350_2.png) [@ToddZ](https://meta.discourse.org/u/ToddZ)\ **Post date:** [2024年十月30日 07:12 UTC](https://meta.discourse.org/t/email-to-custom-address-fails-lost-connection-after-ehlo/333553/1 "2024-10-30T07:12:32Z")
我有一个类别，其中设置了“自定义入站电子邮件地址”——[CATEGORY]@forum.tasat.org 当我直接从 Gmail 发送电子邮件到该地址时，消息会按预期处理并进入该类别。 mail-receiver 成功日志： ```plaintext Oct 30 05:26:43 forum-mail-receiver postfix/smtpd[76028]: connect from mail-ot1-f46.google.com[209.85.210.46] Oct 30 05:26:43 forum-mail-receiver postfix/smtpd[76028]: B5B78309A1E: client=mail-ot1-f46.google.com[209.85.210.46] Oct 30 05:26:43 forum-mail-receiver postfix/cleanup[76035]: B5B78309A1E: message-id= Oct 30 05:26:43 forum-mail-receiver postfix/qmgr[98]: B5B78309A1E: from=<[NAME]@gmail.com>, size=3056, nrcpt=1 (queue active) Oct 30 05:26:43 forum-mail-receiver postfix/smtpd[76028]: disconnect from mail-ot1-f46.google.com[209.85.210.46] ehlo=1 mail=1 rcpt=1 bdat=1 quit=1 commands=5 <23>Oct 30 05:26:43 receive-mail[76037]: Recipient: [CATEGORY]@forum.tasat.orgOct 30 05:26:44 forum-mail-receiver postfix/pipe[76036]: B5B78309A1E: to=<[CATEGORY]@forum.tasat.org>, relay=discourse, delay=0.57, delays=0.23/0.02/0/0.32, dsn=2.0.0, status=sent (delivered via discourse service) Oct 30 05:26:44 forum-mail-receiver postfix/qmgr[98]: B5B78309A1E: removed ``` 但是，当我从 [carrd.co](http://carrd.co) 上的登陆页面的联系表单向 [CATEGORY]@forum.tasat.org 提交内容完全相同的消息时，它没有被处理。 mail-receiver 失败日志： ```plaintext Oct 30 06:47:20 forum-mail-receiver postfix/smtpd[76057]: connect from a69-230.smtp-out.amazonses.com[54.240.69.230] Oct 30 06:47:20 forum-mail-receiver postfix/smtpd[76057]: lost connection after EHLO from a69-230.smtp-out.amazonses.com[54.240.69.230] Oct 30 06:47:20 forum-mail-receiver postfix/smtpd[76057]: disconnect from a69-230.smtp-out.amazonses.com[54.240.69.230] ehlo=1 commands=1 ``` 显然，EHLO 命令用于“识别发送主机的域名到 SMTP”。 我不知道该怎么办。什么会导致 EHLO 失败？我需要将 SES 列入白名单吗？ ---
**Author:** ![supermathie](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/supermathie/32/507518_2.png) [@supermathie](https://meta.discourse.org/u/supermathie)\ **Post date:** [2024年十月30日 16:48 UTC](https://meta.discourse.org/t/email-to-custom-address-fails-lost-connection-after-ehlo/333553/2 "2024-10-30T16:48:49Z")
> [@ToddZ](#): > > 我不知道该怎么办。什么会导致 EHLO 失败？我需要将 SES 列入白名单还是其他什么……？ EHLO 可能没有失败；postfix 说发送端发送了 `EHLO` 然后断开了连接。类似这样： ```plaintext [baron ~]$ telnet forum.tasat.org 25 Trying 64.176.213.39... Connected to forum.tasat.org. Escape character is '^]'. 220 ESMTP server EHLO baron 250-forum-mail-receiver.localdomain 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250-DSN 250 CHUNKING ^] telnet> quit ``` （你的日志中可能会看到一条引用我 IP 地址的类似消息） 这是 SES 端的问题。我建议监控端口 25 上进来的流量，看看是否有任何迹象表明_为什么_它会断开连接，或者检查 SES 是否有任何日志。 ---
**Author:** ![ToddZ](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/toddz/32/328350_2.png) [@ToddZ](https://meta.discourse.org/u/ToddZ)\ **Post date:** [2024年十月30日 18:21 UTC](https://meta.discourse.org/t/email-to-custom-address-fails-lost-connection-after-ehlo/333553/3 "2024-10-30T18:21:50Z")
感谢 supermathie – 我无法访问 [carrd.co](http://carrd.co) 的 SES 日志，但我有另一封失败尝试的端口 25 日志。（希望我知道如何解读。）这里有什么让你觉得奇怪的地方吗……？ > **SES 失败 - Discourse 邮件接收器日志** > > ```plaintext > Oct 30 16:50:11 forum-mail-receiver postfix/anvil[76091]: statistics: max connection count 1 for (smtp:159.203.42.156) at Oct 30 16:46:35 > Oct 30 16:50:11 forum-mail-receiver postfix/anvil[76091]: statistics: max cache size 1 at Oct 30 16:46:35 > Oct 30 17:49:01 forum-mail-receiver postfix/smtpd[76093]: connect from a69-230.smtp-out.amazonses.com[54.240.69.230] > Oct 30 17:49:01 forum-mail-receiver postfix/smtpd[76093]: lost connection after EHLO from a69-230.smtp-out.amazonses.com[54.240.69.230] > Oct 30 17:49:01 forum-mail-receiver postfix/smtpd[76093]: disconnect from a69-230.smtp-out.amazonses.com[54.240.69.230] ehlo=1 commands=1 > root@forum:/var/discourse# > > ``` > **SES 失败 - Wireshark 端口 25 日志** > > ```plaintext > No. Time Source Destination Protocol Length Info > 11913 85.864926 54.240.69.230 64.176.213.39 TCP 74 50903 → 25 [SYN] Seq=0 Win=26883 Len=0 MSS=1460 SACK_PERM TSval=1554444054 TSecr=0 WS=128 > 11914 85.865305 64.176.213.39 54.240.69.230 TCP 74 25 → 50903 [SYN, ACK] Seq=0 Ack=1 Win=43440 Len=0 MSS=1460 SACK_PERM TSval=958362575 TSecr=1554444054 WS=1024 > 11921 85.871994 54.240.69.230 64.176.213.39 TCP 66 50903 → 25 [ACK] Seq=1 Ack=1 Win=27008 Len=0 TSval=1554444061 TSecr=958362575 > 12239 86.221038 64.176.213.39 54.240.69.230 SMTP 84 S: 220 ESMTP server > 12245 86.227770 54.240.69.230 64.176.213.39 TCP 66 50903 → 25 [ACK] Seq=1 Ack=19 Win=27008 Len=0 TSval=1554444417 TSecr=958362931 > 12246 86.228748 54.240.69.230 64.176.213.39 SMTP 103 C: EHLO a69-230.smtp-out.amazonses.com > 12247 86.228791 64.176.213.39 54.240.69.230 TCP 66 25 → 50903 [ACK] Seq=19 Ack=38 Win=44032 Len=0 TSval=958362939 TSecr=1554444418 > 12248 86.228963 64.176.213.39 54.240.69.230 SMTP 220 S: 250-forum-mail-receiver.localdomain | PIPELINING | SIZE 10240000 | VRFY | ETRN | ENHANCEDSTATUSCODES | 8BITMIME | DSN | CHUNKING > 12253 86.236796 54.240.69.230 64.176.213.39 TCP 66 50903 → 25 [ACK] Seq=38 Ack=173 Win=28032 Len=0 TSval=1554444426 TSecr=958362939 > 12254 86.237257 64.176.213.39 54.240.69.230 TCP 66 25 → 50903 [FIN, ACK] Seq=173 Ack=39 Win=44032 Len=0 TSval=958362947 TSecr=1554444426 > 12257 86.243960 54.240.69.230 64.176.213.39 TCP 66 50903 → 25 [ACK] Seq=39 Ack=174 Win=28032 Len=0 TSval=1554444433 TSecr=958362947 > > ``` 作为对比： [details=“Gmail 成功 - Wireshark 端口 25 日志”] ```plaintext No. Time Source Destination Protocol Length Info 1173638 893.998102 162.142.125.93 64.176.213.39 TCP 74 27763 → 25 [SYN] Seq=0 Win=42340 Len=0 MSS=1460 SACK_PERM TSval=1729720003 TSecr=0 WS=1024 1173639 893.998341 64.176.213.39 162.142.125.93 TCP 74 25 → 27763 [SYN, ACK] Seq=0 Ack=1 Win=43440 Len=0 MSS=1460 SACK_PERM TSval=2319295245 TSecr=1729720003 WS=1024 1173667 894.015884 162.142.125.93 64.176.213.39 TCP 54 27763 → 25 [RST] Seq=1 Win=0 Len=0 1178853 897.638926 162.142.125.207 64.176.213.39 TCP 74 60246 → 25 [SYN] Seq=0 Win=21900 Len=0 MSS=1460 SACK_PERM TSval=1654559109 TSecr=0 WS=1024 1178855 897.639088 64.176.213.39 162.142.125.207 TCP 74 25 → 60246 [SYN, ACK] Seq=0 Ack=1 Win=43440 Len=0 MSS=1460 SACK_PERM TSval=461108143 TSecr=1654559109 WS=1024 1178884 897.656814 162.142.125.207 64.176.213.39 TCP 66 60246 → 25 [ACK] Seq=1 Ack=1 Win=22528 Len=0 TSval=1654559127 TSecr=461108143 1179106 897.805588 64.176.213.39 162.142.125.207 SMTP 84 S: 220 ESMTP server 1179134 897.823322 162.142.125.207 64.176.213.39 TCP 66 60246 → 25 [ACK] Seq=1 Ack=19 Win=22528 Len=0 TSval=1654559293 TSecr=461108310 1179139 897.825315 162.142.125.207 64.176.213.39 SMTP 86 C: EHLO www.censys.io 1179140 897.825350 64.176.213.39 162.142.125.207 TCP 66 25 → 60246 [ACK] Seq=19 Ack=21 Win=44032 Len=0 TSval=461108329 TSecr=1654559295 1179142 897.825495 64.176.213.39 162.142.125.207 SMTP 220 S: 250-forum-mail-receiver.localdomain | PIPELINING | SIZE 10240000 | VRFY | ETRN | ENHANCEDSTATUSCODES | 8BITMIME | DSN | CHUNKING 1179173 897.844902 162.142.125.207 64.176.213.39 SMTP 76 C: STARTTLS 1179174 897.845039 64.176.213.39 162.142.125.207 SMTP 108 S: 502 5.5.1 Error: command not implemented 1179207 897.865559 162.142.125.207 64.176.213.39 TCP 66 60246 → 25 [ACK] Seq=31 Ack=215 Win=22528 Len=0 TSval=1654559335 TSecr=461108349 1179208 897.865879 64.176.213.39 162.142.125.207 TCP 66 25 → 60246 [FIN, ACK] Seq=215 Ack=32 Win=44032 Len=0 TSval=461108370 TSecr=1654559335 1179237 897.883702 162.142.125.207 64.176.213.39 TCP 66 60246 → 25 [ACK] Seq=32 Ack=216 Win=22528 Len=0 TSval=1654559353 TSecr=461108370 1423203 1062.340039 2001:4860:4864:20::33 2001:19f0:1000:68ec:5400:4ff:fe92:8e2b TCP 94 45423 → 25 [SYN] Seq=0 Win=65535 Len=0 MSS=1440 SACK_PERM TSval=980279080 TSecr=0 WS=256 1424699 1063.379486 2001:4860:4864:20::33 2001:19f0:1000:68ec:5400:4ff:fe92:8e2b TCP 94 [TCP Retransmission] 45423 → 25 [SYN] Seq=0 Win=65535 Len=0 MSS=1440 SACK_PERM TSval=980280120 TSecr=0 WS=256 1426247 1064.403473 2001:4860:4864:20::33 2001:19f0:1000:68ec:5400:4ff:fe92:8e2b TCP 94 [TCP Retransmission] 45423 → 25 [SYN] Seq=0 Win=65535 Len=0 MSS=1440 SACK_PERM TSval=980281144 TSecr=0 WS=256 1427782 1065.427579 2001:4860:4864:20::33 2001:19f0:1000:68ec:5400:4ff:fe92:8e2b TCP 94 [TCP Retransmission] 45423 → 25 [SYN] Seq=0 Win=65535 Len=0 MSS=1440 SACK_PERM TSval=980282168 TSecr=0 WS=256 1429343 1066.451555 2001:4860:4864:20::33 2001:19f0:1000:68ec:5400:4ff:fe92:8e2b TCP 94 [TCP Retransmission] 45423 → 25 [SYN] Seq=0 Win=65535 Len=0 MSS=1440 SACK_PERM TSval=980283192 TSecr= ``` ---
**Author:** ![supermathie](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/supermathie/32/507518_2.png) [@supermathie](https://meta.discourse.org/u/supermathie)\ **Post date:** [2024年十月30日 18:25 UTC](https://meta.discourse.org/t/email-to-custom-address-fails-lost-connection-after-ehlo/333553/4 "2024-10-30T18:25:23Z")
> [@ToddZ](#): > > ```plaintext > 12246 86.228748 54.240.69.230 64.176.213.39 SMTP 103 C: EHLO a69-230.smtp-out.amazonses.com > 12247 86.228791 64.176.213.39 54.240.69.230 TCP 66 25 → 50903 [ACK] Seq=19 Ack=38 Win=44032 Len=0 TSval=958362939 TSecr=1554444418 > 12248 86.228963 64.176.213.39 54.240.69.230 SMTP 220 S: 250-forum-mail-receiver.localdomain | PIPELINING | SIZE 10240000 | VRFY | ETRN | ENHANCEDSTATUSCODES | 8BITMIME | DSN | CHUNKING > 12253 86.236796 54.240.69.230 64.176.213.39 TCP 66 50903 → 25 [FIN, ACK] Seq=38 Ack=173 Win=28032 Len=0 TSval=1554444426 TSecr=958362939 > > ``` SES 在数据包 12253（`FIN`）中自行关闭了连接。 至于原因，您需要咨询 AWS。 ---
**Author:** ![ToddZ](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/toddz/32/328350_2.png) [@ToddZ](https://meta.discourse.org/u/ToddZ)\ **Post date:** [2024年十月31日 21:04 UTC](https://meta.discourse.org/t/email-to-custom-address-fails-lost-connection-after-ehlo/333553/5 "2024-10-31T21:04:47Z")
非常感谢！我已经请求 [carrd.co](http://carrd.co) 支持检查日志，但他们显然位于邻近的太阳系。可能需要一段时间我才能获得更多信息。 ---
**Author:** ![ToddZ](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/toddz/32/328350_2.png) [@ToddZ](https://meta.discourse.org/u/ToddZ)\ **Post date:** [2024年十一月7日 00:47 UTC](https://meta.discourse.org/t/email-to-custom-address-fails-lost-connection-after-ehlo/333553/6 "2024-11-07T00:47:32Z")
好吧，我从 [carrd.co](http://carrd.co) 获得的支持信息不多，除了他们声称使用“机会性 TLS”，应该会回退到未加密连接。 我没有通过的那个 [邮件服务器健康检查](https://mxtoolbox.com/emailhealth) 是 SMTP 标志与反向 DNS `PTR` 记录提供的域不匹配。在 [元论坛的其他地方](https://meta.discourse.org/t/customize-direct-delivery-postfix-configuration/118759/17?u=toddz)，我找到了在 `env:` 下添加 `mail-receiver.yml` 的想法： ```plaintext POSTCONF_smtpd_banner: forum.tasat.org ESMTP $mail_name ``` 这解决了关于 SMTP 标志不匹配的标志，并且入站邮件失败从 HELO 断开改为 STARTTLS 断开。 我终于启用了 TLS，并且来自联系表的电子邮件已成功发送。 不过，随着流程现在正常工作，它也暴露了我通过 Web 表单摄取主题的整个想法中的一些缺陷。但这将是另一个话题。 ---
**Author:** ![system](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/system/32/443519_2.png) [@system](https://meta.discourse.org/u/system)\ **Post date:** [2025年十月17日 06:38 UTC](https://meta.discourse.org/t/email-to-custom-address-fails-lost-connection-after-ehlo/333553/7 "2025-10-17T06:38:17Z")
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