使用第三方 smtp 服务器时的 AWS EC2 电子邮件发送限制 [英] AWS EC2 email sending limit when using third party smtp server

问题描述

当我使用第三方 SMTP 服务器发送电子邮件时，我可以从 EC2 实例发送的电子邮件数量是否有任何限制?我使用EC2实例调用客户端的smtp服务器.

Are there any limits on the number of emails I can send from an EC2 instances when I am using a third party SMTP server to send out emails ? I use the EC2 instance to call the client's smtp server.

谢谢桑托什

推荐答案

是的，如果您通过 TCP 端口 25 连接到第三方服务器，EC2 基础架构会施加限制，作为反垃圾邮件措施.

Yes, if you are connecting to the third-party server over TCP port 25, there is a limit imposed by the EC2 infrastructure, as an anti-spam measure.

您可以请求解除此限制，或者，最简单且可以说是最正确的解决方案，通过端口 587 (SMTP-MSA) 而不是 25 (SMTP-MTA) 连接到服务器.(第三方邮件服务器应该会支持的，除非他们真的好几年没关注了.)

You can request that this restriction be lifted, or, the simplest and arguably most correct solution, connect to the server on port 587 (SMTP-MSA) instead of 25 (SMTP-MTA). (The third party mail server should support it unless they really haven't been paying attention for several years.)

参见 http://en.m.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol

或者，使用 SSL 会更好.

Or, using SSL would be even better.

如果您没有通过端口 25 连接到第 3 方服务器，那么绝对没有限制.

If you aren't connecting to the 3rd party server on port 25, then there's absolutely no limit.

https://aws-portal.amazon.com/gp/aws/html-forms-controller/contactus/ec2-email-limit-rdns-request ... 如果您想请求删除，可以使用该表单端口 25 块，但这也需要你建立反向 dns 来承担额外的责任，以消除对端口 25 的限制，如果你想走那条路的话.

https://aws-portal.amazon.com/gp/aws/html-forms-controller/contactus/ec2-email-limit-rdns-request ... is the form you can use if you want to request removal of the port 25 block, but this also requires you to establish reverse dns to take additional responsibility for the removed restriction on port 25, if you want to take that route, instead.

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