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EC2のpostfixでSESにリレーしてメールを送る設定

Last updated at Posted at 2014-10-21

EC2からメールを送ると結構すぐにブロックされるらしいので、メールの送信をSES経由で行うようにする。
SESは設定済としてPostfixのリレー設定方法。

SMTP認証に必要なパッケージをインストール

yum -y install cyrus-sasl-plain cyrus-sasl-md5

/etc/postfix/main.cf に以下のような記述を追加。
relayhostはSESのSMTPエンドポイント

relayhost = email-smtp.us-east-1.amazonaws.com:25
smtp_sasl_auth_enable = yes
smtp_sasl_security_options = noanonymous
smtp_sasl_password_maps = hash:/etc/postfix/sasl_password
smtp_use_tls = yes
smtp_tls_security_level = encrypt
smtp_tls_note_starttls_offer = yes
smtp_tls_CAfile = /etc/ssl/certs/ca-bundle.crt

# fix for CVE-2014-3556 (POODLE)
smtpd_tls_mandatory_protocols=!SSLv2,!SSLv3
smtp_tls_mandatory_protocols=!SSLv2,!SSLv3
smtpd_tls_protocols=!SSLv2,!SSLv3
smtp_tls_protocols=!SSLv2,!SSLv3

/etc/postfix/sasl_passwdを作成

echo "email-smtp.us-east-1.amazonaws.com:25 アクセスキー:シークレットキー" > /etc/postfix/sasl_password

ハッシュ化

postmap hash:/etc/postfix/sasl_password 

再起動

/etc/init.d/postfix restart

確認

mail hogehoge@hogehoge.com

/var/log/maillogの確認 & 実際にメールが届いたかを確認。

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