False rejection of valid sender domain
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Re: False rejection of valid sender domain
13-02-2019 10:19 PM - edited 13-02-2019 10:21 PM
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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.
Re: False rejection of valid sender domain
14-02-2019 6:07 AM
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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.
Re: False rejection of valid sender domain
14-02-2019 7:18 AM
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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).
Re: False rejection of valid sender domain
09-03-2019 9:18 AM - edited 09-03-2019 9:21 AM
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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.
Re: False rejection of valid sender domain
12-03-2019 8:54 AM
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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.
Re: False rejection of valid sender domain
12-03-2019 12:11 PM
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Re: False rejection of valid sender domain
12-03-2019 2:43 PM
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Hi @robatworkuk, I've raised your issue to our Net Ops Team and we will get back to you once we have a response.
Re: False rejection of valid sender domain
12-03-2019 2:52 PM
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@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
Re: False rejection of valid sender domain
12-03-2019 3:09 PM
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Thanks @robatworkuk we've passed the information you PM'd to Matt, onto the Net Ops Team
Re: False rejection of valid sender domain
on 17-03-2019 11:46 AM - last edited on 17-03-2019 2:01 PM by Strat
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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).
Re: False rejection of valid sender domain
22-03-2019 7:45 AM
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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...
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