[AusNOG] O365 Email Issues

[Sam McLeod]

I see this all the time on O365 accounts, it's been a very unreliable service for years from what I've observed.

I've seen this caused both from MS rate limiting their cloud products such as Exchange Online / O365 and from problems within their internal services (I've seen NTP, DNS and other problems between internal MS servers used for O365).

As far as a fix goes, I'm assuming it's a paid / licensed service so I would suggest contacting O365 support with as much diagnostic information as possible in the hope that they don't give you the usual 'reinstall your mail client' line.

--
Sam McLeod (protoporpoise on IRC)
https://smcleod.net
https://twitter.com/s_mcleod

Words are my own opinions and do not necessarily represent those of my employer or partners.

> On 20 Feb 2018, at 1:25 pm, Shane Chrisp <shane at 2000cn.com.au> wrote:
> 
> Hi All,
> 
> Is anyone else seeing issues with delivering mail to O365? We have been seeing a steady stream of problems for the last hour with errors
> 
> Deferred: 451 4.7.500 Server busy. Please try again later
> 
> and also
> 
> Deferred: 452 4.5.3 Too many recipients (AS780090)
> 
> -- 
> Regards
> 
> Shane Chrisp
> 2000 Computers & Networks Pty Ltd
> U8, 19 Outram St, West Perth, WA 6005
> Ph 08 6298 7391 Fx 08 6298 7393
> Mb 0412 409 856
> Email shane at 2000cn.com.au
> Web http://www.2000cn.com.au
> 
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