Mail delivery failed: returning message to sender

S

SpYkz

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Hi Guys,
Not sure if this is the right section for this. Everytime I send an email with an attachment I keep an email back with the subject "Mail delivery failed: returning message to sender". The body of the message below:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

********@gmail.com
SMTP error from remote mail server after end of data:
host 209.203.13.121 [209.203.13.121]: 554 5.7.1 Message refused by content analysis check. This email from IP 196.41.6.173 has been rejected. The email message was detected as spam.

------ This is a copy of the message, including all the headers. ------

Return-path: <*****@nucellular.co.za>
Received: from [10.0.0.249] (port=45260 helo=vox-outbound-av-07)
by smtp.voxtelecom.co.za with esmtp (Exim 4.80.1 (FreeBSD))
(envelope-from <*******@nucellular.co.za>)
id 1bn4NF-0001id-4Y
for **********@gmail.com; Thu, 22 Sep 2016 15:49:13 +0200
and on and on......
 
Are you sending a attachment as well. Try to send just a test email. try to send from another email or gmail to that address.
 
SpYkz said:
Hi Guys,
Not sure if this is the right section for this. Everytime I send an email with an attachment I keep an email back with the subject "Mail delivery failed: returning message to sender". The body of the message below:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

********@gmail.com
SMTP error from remote mail server after end of data:
host 209.203.13.121 [209.203.13.121]: 554 5.7.1 Message refused by content analysis check. This email from IP 196.41.6.173 has been rejected. The email message was detected as spam.

------ This is a copy of the message, including all the headers. ------

Return-path: <*****@nucellular.co.za>
Received: from [10.0.0.249] (port=45260 helo=vox-outbound-av-07)
by smtp.voxtelecom.co.za with esmtp (Exim 4.80.1 (FreeBSD))
(envelope-from <*******@nucellular.co.za>)
id 1bn4NF-0001id-4Y
for **********@gmail.com; Thu, 22 Sep 2016 15:49:13 +0200
and on and on......
Click to expand...

Fortimail (209.203.13.121) is rejecting your mail. Chat to VOX Telecom and ask them what rule is causing the failure.

554 5.7.1 from a quick google seems to indicate SMTP relaying is not being allowed. Are you authenticating against the SMTP server you're using?
 
Forwarded it with the same attachment to my personal gmail and it went through fine.
 
Last edited:
unskinnybob said:
554 5.7.1 from a quick google seems to indicate SMTP relaying is not being allowed. Are you authenticating against the SMTP server you're using?
Click to expand...

Don't know what SMTP relaying means but the section "my outgoing server requires authentication" is unticked and blank
 
SpYkz said:
Don't know what SMTP relaying means but the section "my outgoing server requires authentication" is unticked and blank
Click to expand...

That could be the problem - though if you can send to other destinations fine probably not. Could be the target (recipient) mail server sees your mail address as spoof? Test sending to another destination with the attachment. Maybe not the attachment at all and rather the recipient?
 
Content analysis at the remote end has determined your mail to be spam
 
unskinnybob said:
That could be the problem - though if you can send to other destinations fine probably not. Could be the target (recipient) mail server sees your mail address as spoof? Test sending to another destination with the attachment. Maybe not the attachment at all and rather the recipient?
Click to expand...
According to what you posted earlier it's a fortimail issue which makes sense considering I also get emails from fortimail saying an incoming email was quarantined. With regards the target mail server, the same mail + attachments go through sometimes and fails sometimes to Vodacom and gmail servers
 
as unskinnybob said, contact Vox and ask them to check why your messages are being marked as spam.. they will be able to see why it is getting marked as spam and either relax the filters slightly or remove the suspect rule or tell you to make some change on your end.. at the end of the day, only the mail server admin that is blocking your mail can give you some light as to why it gets marked as spam.. as for it going through when you resend, the mail server is likely able to train itself from false positives and allow mail to be sent after blocking an email for false positive..
 
Do you have any links in your signature that you attach to the email?
Send a test message in plain text without links...
 
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