Im replying on list for visibility. The issue you’re seeing is directly related 
to SMTP smuggling which was discussed on list ad nauseam about a month ago. The 
servers at shaw are configured to reject non-RFC bare linefeeds. Can you 
elaborate on why you’re sending them as they are not allowed. 

> On Feb 1, 2024, at 5:52 PM, Hugh E Cruickshank via mailop <mailop@mailop.org> 
> wrote:
> 
> Hi All:
> 
> We are experiencing a problem with mail delivery to Shaw.ca. Since
> January 18th messages have been bounced with: 552 5.2.0 Message contains
> bare CR and is violating 822.bis section 2.3. We have tried to contact
> postmas...@shaw.ca but have not received any response yet. I was
> wondering if there was anyone on this list who could provide a support
> contact at shaw.ca that might be able assist us with identifying and
> correcting this issue.
> 
> Any suggestions would be greatly appreciated.
> 
> Regards, Hugh
> 
> -- 
> Hugh E Cruickshank, Forward Software, www.forward-software.com
> 
> _______________________________________________
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> mailop@mailop.org
> https://list.mailop.org/listinfo/mailop

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