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2016-09-08

Bounced email: all failed error mail:#< #5.3.0> #SMTP#

Try to do some test cases, I sent a lot of mails(more than 60) to invalid mail address by mail alert through SFDC workflow.

#Workflow rule: When create an new record, a mail will be sent to the invalid email.

After some a lot failed mail, I sent a mail to available email, but it was failed either.

#Debug log shows mail was sent out by workflow, but I can't find the mail in inbox of "sample@mail.com".

#Get error info from error mail as "sample@mail.com#< #5.3.0> #SMTP#"

As email received succeed just before the test and the mails from salesforce isn't in block list. It should not be the problem in mail setting.

Check Configure Deliverability Settings says:
Bounced email
Email that is addressed to an invalid recipient and returned to the sender. If a sender sends several email messages that bounce, the email server might slow or block the delivery of all email from that sender.
It looks like the reason why mail can't be received. So wait the next day(UTC00:00) and it is fixed.

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