550 5.1.1 soft or hard bounce?

bananaaus

bananaaus

New Member
Hi,

I noticed that the following bounce email messages with the same response code are detected as hard and soft bounces. Why is that?

Please note that the real recipient email addresses have valid format and have been altered for privacy. The hosts have also been modified.

------------
Hard bounce

<some_email_address1@some_domain.com>: host xxxx said: 550 5.1.1
<some_email_address1@some_domain.com>... User is unknown {mx-us013} (in reply to RCPT
TO command)

------------
Soft bounce

<some_email_address1@some_domain.com>: host xxxx] said:
550 5.1.1 <some_email_address1@some_domain.com> recipient rejected - User unknown (in
reply to RCPT TO command)


Confused
 
bananaaus

bananaaus

New Member
Here it is...

For the hard bounce

Delivery receipt:

Reporting-MTA: dns; sanitised.net.au
X-Postfix-Queue-ID: 455CE14020
X-Postfix-Sender: rfc822; [email protected]
Arrival-Date: Fri, 23 Mar 2012 18:14:56 +1100 (EST)

Final-Recipient: rfc822; some_email_address1@some_domain.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host xxxx said: 550 5.1.1
<some_email_address1@some_domain.com>... User is unknown {mx-us013} (in reply to RCPT
TO command)

eMail Bounce Handler's log:

4/2 08:41:45 ~ Mail Subject: 'Undelivered Mail Returned to Sender'
4/2 08:41:45 [x] Extracting address from DSN record (#5.1.1)
4/2 08:41:45 ~ Extracting bounce email addresses from "Hard Bad destination mailbox address"
4/2 08:41:45 ~ Address found: <some_email_address1@some_domain.com>
4/2 08:41:45 ~ Mail Subject: ''
4/2 08:41:45 ~ Applying rules to ""
4/2 08:41:45 ~ No bounce found.

For the soft bounce

Delivery receipt:

Reporting-MTA: dns; sanitised.net.au
X-Postfix-Queue-ID: 6E3CE14008
X-Postfix-Sender: rfc822; [email protected]
Arrival-Date: Fri, 23 Mar 2012 18:14:28 +1100 (EST)

Final-Recipient: rfc822; some_email_address2@some_domain.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host xxxx said:
550 5.1.1 <some_email_address2@some_domain.com> recipient rejected - User unknown (in
reply to RCPT TO command)

eMail Bounce Handler's log:

4/2 08:43:32 ~ Mail Subject: 'Undelivered Mail Returned to Sender'
4/2 08:43:32 [x] Extracting address from DSN record (#5.0.0)
4/2 08:43:32 ~ Extracting bounce email addresses from "Soft Unknown address"
4/2 08:43:32 ~ Address found: <some_email_address2@some_domain.com>
4/2 08:43:32 ~ Mail Subject: ''
4/2 08:43:32 ~ Applying rules to ""
4/2 08:43:32 ~ No bounce found.
 
stanbusk

stanbusk

Administrator
Staff member
Thanks for sending that info. The very only bounce I see is:

550 5.1.1 <some_email_address2@some_domain.com> recipient rejected - User unknown (in reply to RCPT TO command)

all the other logs say 'No bounce found'.

Usually a soft bounce is a 4xx error (I don't see any in your connection logs) and a hard bounce is a 5xx error. However eMail Bounce Handler lets you convert several soft bounces into a hard bounce. Can be the case here?
 
bananaaus

bananaaus

New Member
Hi mate,

Shouldn't both of them be identified as hard bounces because of the 550 error?

I haven't changed any settings in the app and I cannot find where that option is.
 
stanbusk

stanbusk

Administrator
Staff member
You say both of them, with both you mean 2 but on all the material you have sent so far I have only seen one bounce, what is the second bounce?
 
bananaaus

bananaaus

New Member
Hi mate,

There are two bounces because I analysed two different bounce messages. Your software identify one as hard bounce and the other one as soft bounce even though both have 550 error code.

Here's a copy of what I've included in the above with the email addresses highlighted.


For the hard bounce

Delivery receipt:

Reporting-MTA: dns; sanitised.net.au
X-Postfix-Queue-ID: 455CE14020
X-Postfix-Sender: rfc822; [email protected]
Arrival-Date: Fri, 23 Mar 2012 18:14:56 +1100 (EST)

Final-Recipient: rfc822; some_email_address1@some_domain.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host xxxx said: 550 5.1.1
<some_email_address1@some_domain.com>... User is unknown {mx-us013} (in reply to RCPT
TO command)

eMail Bounce Handler's log:

4/2 08:41:45 ~ Mail Subject: 'Undelivered Mail Returned to Sender'
4/2 08:41:45 [x] Extracting address from DSN record (#5.1.1)
4/2 08:41:45 ~ Extracting bounce email addresses from "Hard Bad destination mailbox address"
4/2 08:41:45 ~ Address found: <some_email_address1@some_domain.com>
4/2 08:41:45 ~ Mail Subject: ''
4/2 08:41:45 ~ Applying rules to ""
4/2 08:41:45 ~ No bounce found.

For the soft bounce

Delivery receipt:

Reporting-MTA: dns; sanitised.net.au
X-Postfix-Queue-ID: 6E3CE14008
X-Postfix-Sender: rfc822; [email protected]
Arrival-Date: Fri, 23 Mar 2012 18:14:28 +1100 (EST)

Final-Recipient: rfc822; some_email_address2@some_domain.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host xxxx said:
550 5.1.1 <some_email_address2@some_domain.com> recipient rejected - User unknown (in
reply to RCPT TO command)

eMail Bounce Handler's log:

4/2 08:43:32 ~ Mail Subject: 'Undelivered Mail Returned to Sender'
4/2 08:43:32 [x] Extracting address from DSN record (#5.0.0)
4/2 08:43:32 ~ Extracting bounce email addresses from "Soft Unknown address"
4/2 08:43:32 ~ Address found: <some_email_address2@some_domain.com>
4/2 08:43:32 ~ Mail Subject: ''
4/2 08:43:32 ~ Applying rules to ""
4/2 08:43:32 ~ No bounce found.
 
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