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flohogun2  
#1 Posted : Friday, September 30, 2016 11:51:03 PM(UTC)
flohogun2

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Hello,

When we parse an email and got a Failure Delivery Report, if the type of repport is Failure Report, is it possible to know if the type is hard bounce (the email does not exist) or soft bounce (for exemple delay or blacklist)

Best regards

Florent
ivan  
#2 Posted : Saturday, October 1, 2016 6:42:51 PM(UTC)
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There is not a standard, but you can guess it by ErrDescription, if the description contains "mailbox", "user", it is likely a hard bounce, otherwise, it is a soft bounce.
thanks 1 user thanked ivan for this useful post.
flohogun2 on 10/4/2016(UTC)
flohogun2  
#3 Posted : Tuesday, October 4, 2016 4:44:32 AM(UTC)
flohogun2

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Thank

Is it fiable to use SMTP codes like 5.1.1?

Best regards

florent
ivan  
#4 Posted : Tuesday, October 4, 2016 6:03:31 AM(UTC)
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Yes, you can refer to

https://www.ietf.org/rfc/rfc2821.txt

but not every SMTP server always returns the same error code.
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