Re: [mailop] Problems reaching uwo.ca

[Graeme Fowler via mailop]

On 19 Oct 2020, at 12:18, Graeme Fowler via mailop  wrote:
> Just seeing if anyone else is experiencing an issue we're having ("we" being 
> Loughborough University), or if it is indeed Just Us [tm]. If anyone from or 
> related to uwo.ca is on the list, so much the better.

Not yet resolved but a contact withing UWO has advised they're having network 
problems with their connection to their local NREN.

Ta for the off-list responses.

Graeme
___
mailop mailing list
mailop@mailop.org
https://list.mailop.org/listinfo/mailop

[mailop] Problems reaching uwo.ca

[Graeme Fowler via mailop]

Hi all

(cross-posted so apologies if you get this more than once)

Just seeing if anyone else is experiencing an issue we're having ("we" being 
Loughborough University), or if it is indeed Just Us [tm]. If anyone from or 
related to uwo.ca is on the list, so much the better.

We've had reports this morning of us rejecting emails from uwo.ca, and we have 
emails to uwo.ca stuck in the outbound queue. Inbound rejections are because we 
can't resolve the inbound MAIL FROM domain - lookups time out.

It seems we are unable to make any DNS queries against their IPv4 nameserver 
addresses. We can against their IPv6 nameserver addresses but there's no IPv6 
glue in their delegation from the .ca nameservers, we need to use v4 - and 
can't.

It also looks like we can't talk to the MX server farm on port 25 either.

So... is it a routing problem, or have we upset uwo.ca for some reason?

Regards

Graeme


___
mailop mailing list
mailop@mailop.org
https://list.mailop.org/listinfo/mailop