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AWS 25 port can not send mail how to do, in response to this problem, this article describes in detail the corresponding analysis and answers, hoping to help more partners who want to solve this problem to find a more simple and easy way.

I have trouble sending email through port 25 of the Amazon EC2 instance, or I frequently receive timeout errors. what should I do?

0 solution

By default, Amazon EC2 restricts traffic on port 25 of all EC2 instances, but you can request that this limit be removed.

1Global account

First, you must create the appropriate DNS A record:

If you use Amazon Route 53 as your DNS service, create a new resource recordset that contains an A record, or update the existing resource recordset to include the new A record.

If you are using a service other than Amazon Route 53, ask your DNS provider to create an A record for you.

Then, request AWS to remove the port 25 limit on the instance:

Log in with your AWS account root credentials, and then open https://aws.amazon.com/forms/ec2-email-limit-rdns-request?catalog=true&isauthcode=true to fill in the request form to remove email sending restrictions.

In the Use Case Description field, provide a description of your use case.

(optional) provide the elastic IP address owned by AWS (which is used to send outbound email) and any reverse DNS records that AWS needs to associate with the elastic IP address. AWS will use this information to help reduce the chances that e-mail sent through elastic IP addresses will be marked as spam.

Select Submit.

If your request is approved, you will receive an email informing you that the port 25 limit on the EC2 instance has been removed.

2 China China account

You need to submit the relevant Case through the AWS support Center to remove the relevant restrictions. The location of the case submission can be found in the following figure:

If your request is approved, you will receive an email informing you that the port 25 limit on the EC2 instance has been removed.

This is the answer to the question about how the AWS 25 port can not send email. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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