Why am I getting bouncebacks for messages I didn't send?

If you are receiving a large number of replies or bouncebacks for emails that you didn't send, or from email addresses that show your domain but don't exist, you may have been spammed.

There's a spoofing technique where a spammer sends huge volumes of email messages that appear to be from you or someone other than the actual source. Spammers often use a random address in their spam list as the From address to disguise the true source.

Here are some ways you can protect yourself and your email account from being spammed:

• スパムメールに配信停止を依頼しないでください。 返信すると、スパム送信者にメールアドレスが有効であることを知らせることになります。
• Webサイトでのみ使用する別のメールアドレスを作成します。
• If you have the catch-all feature for your domain turned on, temporarily turn it off.
• Set up an SPF record to prevent further abuse to your domain.