My mail client is reporting an SMTP error for a message it tried to send using a GSuite mail account. I know the connection generally works because it sends 100s of emails a day.
Today I got this error message for a handful of send attempts:
SMTPDataError: 451
4.3.0 Mail server temporarily rejected message. q3sm7938966qta.74 - gsmtp
I'm trying to determine if this message was actually sent, but I am confused. You can see the client is reporting the error message above from GSuite.
If I look up this message in the GSuite email logs, it says it was sent, but not delivered to the recipient. It also says it was "Rejected".
So far it would seem the message was not successfully sent. However, if I look in the sent messages folder of the account, the message shows. There is no related bounce back message anywhere either.
So I am confused as to whether this message was actually sent. I don't want to resend it if it was already sent successfully. Can someone clarify what all of this means?