I received a notification email with the subject Delivery Status Notification (Delay) from Gmail’s forwarding settings.

The email content is as follows:

This is an automatically generated Delivery Status Notification

THIS IS A WARNING MESSAGE ONLY.

YOU DO NOT NEED TO RESEND YOUR MESSAGE.

Delivery to the following recipient has been delayed:

 [email protected]

Message will be retried for 2 more day(s)

Technical details of temporary failure: Google tried to deliver your message, but it was rejected by the server for the recipient domain gmail.com by gmail-smtp-in.l.google.com. [74.125.205.27].

The error that the other server returned was: 452-4.2.2 The email account that you tried to reach is over quota. Please direct 452-4.2.2 the recipient to 452 4.2.2 http://support.google.com/mail/bin/answer.py?answer=6558 xp1si7533737lbb.14 - gsmtp

----- Original message -----

(Continued below)

When I read it carefully,

Delivery to the following recipient has been delayed:

 [email protected]

Message will be retried for 2 more day(s)

So it was a notification email saying that emails had not been forwarded to [email protected] for more than 2 days.

When I checked the The error that the other server returned was: section in detail, there was a URL:

・Check your storage limit - Gmail Help

After reading the contents, it appeared that the cause was the Gmail forwarding destination reaching its storage capacity limit.

Deleting unnecessary files from Gmail or Google Drive should make email forwarding work normally again.

That’s all from the Gemba.