使用外部smtp服务器发送电子邮件时达到Amazon EC2邮件限制

Question

Hi
I am sending lots of emails from and Amazon EC2 linux instance using grails MailSender Service(Uses Java Mail API underneath). I have configured the Mail API to use an external smtp server on port 25 to send the emails and I could verify from the external email server logs that emails are indeed sent by them.

But Amazon AWS has sent me an email saying that I reached their email sending limit to send out of SMTP port 25 .

I am not able to understand how did I reach the limit when I have always used external smtp server to send emails. Additionally, I do get intermittent connection timeout errors for connecting to the external smtp server from the Java Mail API.

Any help is greatly appreciated.

Thanks

Answer 1

There's a limit on outbound emails to stop spamming (I presume). You can request to override this: https://aws-portal.amazon.com/gp/aws/html-forms-controller/contactus/ec2-email-limit-rdns-request

Answer 2

顺便说一句，如果您从AWS基础架构发送大量电子邮件，您可能会对这项新服务感兴趣： Amazon Simple Email Service 。

Answer 3

它们可能会限制端口25上的总连接数，并且当您使用该端口连接到外部服务器时，它与直接从服务器发送电子邮件相同。

Answer 4

My suggestion will be until amazon removes your smtp limit, connect to your email server using VPN. I had a similar issue using phpmailer with tls and sasl authentication on port 25. Because we are hosting our email server I was able to use the VPN to connect on the email server and send emails out.