cancel
Showing results for 
Search instead for 
Did you mean: 

False rejection of valid sender domain

MJN
Aspiring Pro
Posts: 1,154
Thanks: 66
Fixes: 3
Registered: ‎26-08-2010

Re: False rejection of valid sender domain

If you are not sending out via Plusnet's mail relay (which I am assuming you are not given the discussion surrounding getting taken off the Zen BL) then you will not be affected by the subject of this thread.

Silanthril
Hooked
Posts: 6
Registered: ‎10-12-2018

Re: False rejection of valid sender domain

I would be interested to know why the outgoing mail server is affecting incoming mail and why delivery of mail to me and what outgoing server I use affects the sender.

MJN
Aspiring Pro
Posts: 1,154
Thanks: 66
Fixes: 3
Registered: ‎26-08-2010

Re: False rejection of valid sender domain

The issue is that the Plusnet mail servers perform a DNS lookup on the *sender* domain, presumably as an anti-spam measure based on whether or not the domain actually exists. It would appear however that even when a domain does exist this check is sometimes failing and resulting in a rejection of the message. In direct answer to your question I suspect that their anti-spam measures are applied symmetrically for both outbound and incoming mail (which is a fairly common configuration).

Highlighted
Community Veteran
Posts: 1,737
Thanks: 89
Fixes: 2
Registered: ‎17-06-2007

Re: False rejection of valid sender domain

Another failure (incoming email to my brother) on

  host mx.avasin.plus.net [212.159.9.200]

 

which is the same one that has failed the two previous times I've reported it.

robatworkuk
Grafter
Posts: 32
Thanks: 4
Registered: ‎23-05-2017

Re: False rejection of valid sender domain

I am now getting constant rejections to one particular domain - I have PM'd Matthew following his previous request to see the full email/headers. Here it is slightly redacted:

 

Delivery has failed to these recipients or groups:
Jo Bourne (jo.bourne@domain.com)
Your message couldn't be delivered and there was no valid enhanced status code being issued by the remote mail system to determine the exact cause, status: '552 3czUhuRN57iOj3czVhLPIu message rejected due to spam or virus. If you believe this is in error please login to your portal or contact your ISP support team.'.
The following organization rejected your message: avasout02.



Diagnostic information for administrators:
Generating server: EXCHANGE1.ad.mydomain.co.uk
jo.bourne@domain.com
avasout02
Remote Server returned '552 3czUhuRN57iOj3czVhLPIu message rejected due to spam or virus. If you believe this is in error please login to your portal or contact your ISP support team.'
Original message headers:
Received: from EXCHANGE1.ad.mydomain.co.uk (192.168.0.33) by
 EXCHANGE1.ad.mydomain.co.uk (192.168.0.33) with Microsoft SMTP Server
 (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id
 15.1.1531.3; Tue, 12 Mar 2019 08:42:27 +0000
Received: from EXCHANGE1.ad.mydomain.co.uk ([fe80::48f7:1111:1111:d280]) by
 EXCHANGE1.ad.mydomain.co.uk ([fe80::48f7:1111:1111:d280%9]) with mapi id
 15.01.1531.003; Tue, 12 Mar 2019 08:42:27 +0000

This is now on any outgoing email to this domain, original or reply. With just text.  It used to be a bit patchy ie. some emails would get through which I suspected was because of content. Now even a blank email with just a sig gets bounced. 

MJN
Aspiring Pro
Posts: 1,154
Thanks: 66
Fixes: 3
Registered: ‎26-08-2010

Re: False rejection of valid sender domain

The failure above doesn't appear to be related to the DNS issue(s). You would be better off starting a new thread for a more focused response.
Plusnet Help Team
Plusnet Help Team
Posts: 1,050
Thanks: 179
Fixes: 35
Registered: ‎07-12-2017

Re: False rejection of valid sender domain

Hi @robatworkuk, I've raised your issue to our Net Ops Team and we will get back to you once we have a response. 

If this post resolved your issue please click the 'This fixed my problem' button
 Lauren Barry
 Plusnet Help Team
robatworkuk
Grafter
Posts: 32
Thanks: 4
Registered: ‎23-05-2017

Re: False rejection of valid sender domain


@LaurenB wrote:

Hi @robatworkuk, I've raised your issue to our Net Ops Team and we will get back to you once we have a response. 


Thanks Lauren - the PM I referred to went to @MatthewWheeler 

Plusnet Help Team
Plusnet Help Team
Posts: 1,050
Thanks: 179
Fixes: 35
Registered: ‎07-12-2017

Re: False rejection of valid sender domain

Thanks @robatworkuk we've passed the information you PM'd to Matt, onto the Net Ops Team Smiley

If this post resolved your issue please click the 'This fixed my problem' button
 Lauren Barry
 Plusnet Help Team
Community Veteran
Posts: 1,737
Thanks: 89
Fixes: 2
Registered: ‎17-06-2007

Re: False rejection of valid sender domain

another variant

 

Reporting-MTA: dns; avasout04 [212.159.14.19]
Received-From-MTA: dns; xxx.xxx.uk [212.159.61.36]
Arrival-Date: Sun, 17 Mar 2019 11:14:24 +0000


Final-recipient: rfc822; nick@xxxxxxx.org.xx
Diagnostic-Code: smtp; 550-Callout verification failed:

Moderator's note by Dick (Strat): Personal information removed from a public forum (to an area that staff can see).

 

drj
Aspiring Pro
Posts: 1,115
Thanks: 45
Fixes: 1
Registered: ‎30-03-2011

Re: False rejection of valid sender domain

The situation has got worse - previously when this happened - about once or twice a week - I could resend the affected email and it would all be well. Not with one last night...