When you send an email message from your email account and receive an error saying that the mail delivery failed, it means that the receiver did not receive the email you sent. This error could occur if forwarding is turned on in the email account. Also, if the email account is hijacked or if the recipient's mail server has an issue, then the email delivery will fail. The error can be fixed by turning off forwarding. There are also few other solutions to fix the mail delivery error. Continue reading to learn how to disable Mail delivery subsystem in Gmail.
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