[AusNOG] Microsoft outlook.com, live.com, Office365 etc IP blocking

[Shane Clay]

I dealt with this exact same issue for an Anti-Spam product we run which acts as a relay between sender and recipient. Office 365 began blocking all inbound mail (due to rate limiting and some SPF issues). From what I learned in my situation - its about "warming up your IPs" so they earn reputation and trust from MS. That takes time (at least several weeks)... which isn't always an option.

I got it solved by having 2 IPs which we use exclusively for sending mail to Office 365 added to MS's "whitelist".

The approach that worked for me was to have several of our customers who use Office 365 raise fault tickets with them about not receiving email. Provide logs from them to MS which show the mail coming from your IP. Then... get on the phone and just keep using the word "escalate" until it happens. For them to help you, you need to be their customer.... so some role playing is required.

It's a painful process that I never want to repeat. Took about 2 days to get a solution in place.

MailOp mailing list was extremely helpful in understanding how to work MS's processes. Michael Wise is the guy from MS I think.

Shane


-----Original Message-----
From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Burt Mascareigne
Sent: Monday, 13 November 2017 11:21 AM
To: Bill Walker <bill at wjw.nz>; paul+ausnog at oxygennetworks.com.au
Cc: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Microsoft outlook.com, live.com, Office365 etc IP blocking

I've had the exact same issue.  It doesn't work, well, I've applied and begged and did everything I can. I'm still being blocked.

I've had to ship my emails to SendGrid as my SMTP relay. 

I've gone on postmaster live, I've signed up my IPs (with the help of Servers Australia) and white listed it. 

Joining SNDS and JMRP is what you are suppose to do... doesn't seem to do anything though. 

I've written to Microsoft, got a response from someone. No effect.

I've called them up, which was a waste of time, they told me I had to do it online.



Regards,
 

Burt Mascareigne
Mobile 0414 450 962   Office (02) 9965 5422 Address Level 19, 1 O'Connell Street, Sydney NSW 2000 Web http://www.stormnetwork.com.au



-----Original Message-----
From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Bill Walker
Sent: Monday, 13 November 2017 10:33 AM
To: paul+ausnog at oxygennetworks.com.au
Cc: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Microsoft outlook.com, live.com, Office365 etc IP blocking

Hey Paul,

Have you registered with https://postmaster.live.com/snds/index.aspx ?

Once registered you can request access to all IP's with a source of your ASN and see whats going on from MS's perspective.

Cheers,

Bill

On 2017-11-13 11:56, paul+ausnog at oxygennetworks.com.au wrote:
> Hi All, just wondering if anybody can suggest a better approach to 
> this situation for us.
> 
> We had a new IP block allocated a while ago for customers and are 
> beginning to migrate customers onto that block now off an old one, 
> however it seems that Microsoft is not trusting any IP's in that block 
> for some reason, perhaps they have been spammed in the past or 
> something from it.
> 
> The only option seems to be requesting each individual address to be 
> removed from the block, which after getting their automated response 
> which says that they can't do it you then reply and they will do it, 
> but only 1 at a time even though we have asked about the whole block 
> but had no response.
> 
> Can anybody suggest a better approach or is there a better contact we 
> might be able to use then the standard outlook.com delivery support 
> people ?
> 
> Thanks
> 
> Paul
> --
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