EC2ではポート25利用制限、メール送信数制限が行われているため、制限の解除と逆引きDNS設定をおこなった。
これは一回の申請ですべて可能。
以下のアドレスを開き、入力する。
https://console.aws.amazon.com/support/contacts?#/rdns-limits
Email address: xxx@domain.com Use case description: メールサーバー構築のため。(rDNS registration.) Elastic IP address - optional: xxx.xxx.xxx.xxx Reverse DNS record - optional: mail.domain.com
ほどなく、以下の受け付けメールが届いた。
題名: Your AWS Inquiry [99999] 差出人: Amazon Web Services Hello, Thank you for contacting Amazon Web Services. We have received your request and will begin reviewing soon. Your request tracking ID is: 99999 Requests are evaluated in the order in which they are received. AWS is committed to being responsive and keeping you informed of our progress. You should expect to receive a non-automated response to your initial contact within 48 business hours, however please be aware that evaluation may take longer depending on the complexity of the request. 省略…
一時間ほどして追加情報の問い合わせメールが届いた。
題名 : Your AWS Inquiry [99999] 差出人 :Amazon Web Services Hello, Thank you for submitting your request to have the email sending limit removed from your account and/or for an rDNS update. In order for us to process this request as quickly as possible, please provide the following information: -A clear/detailed use-case for sending mail from EC2. -What type of configuration or setup have you implemented to prevent spam from originating from your EC2 resource? Please reply directly to this message with the above information. Once this has been received we can process your original request. As a reference, please make sure to review the AWS Acceptable Use Policy (https://aws.amazon.com/aup/) for more information regarding prohibited uses of AWS services. We appreciate your cooperation, if you have any questions, please reach out to us. Regards, Amazon Web Services
このリクエストをできる限り迅速に処理するために、次の情報を提供してください。 -EC2からメールを送信するための明確で詳細なユースケース。 -EC2リソースからスパムが送信されるのを防ぐために、どのような構成または設定を実装しましたか? 上記の情報を添えて、このメッセージに直接返信してください。これを受け取ったら、元のリクエストを処理できます。参照として、AWSの利用規定(https://aws.amazon.com/aup/)を必ず確認してください
これに関して以下のようにメールを返した。
Hello, Thank you for your inquiry Run WordPress on Windows Serer 2016 on Lightsail and open a blog. Hobby club (about 30 people) shares information among members and manages mailing list. Announce an event (about 50 people) that is held once a year and accept participation. Emails will only be sent to the email address requested in advance or on the web, Regards, please nnnn
6時間ほどして、メール制限解除とDNS逆引きの設定が終わったと連絡があった。
題名 : Re: Your AWS Inquiry [99999] 差出人 :Amazon Web Services Hello nnnn, Thank you for getting back to us with the requested. Accordingly, we have configured the reverse DNS record(s) you requested! Your request was mapped for the following: ======================================================= Successfully setup mail.domain.com as rDNS for xxx.xxx.xxx.xxx ======================================================= Please note that propagation of this update to DNSBL services that Amazon works with may take up to a week. Email sending limitations have also been removed for any resources for the region your EIP is located in. Please let us know if you have any questions. Regards, AWS Trust and Safety