Hotmail blocked IP Address for Email

HI,

our Excahnge ip address has been blocked by Microsoft's email servers for Namespace Mining. This was due to a spam attack on our server causing thousands of NDR's to be sent out in a matter of minutes.

I have since rectified this flaw on our server and am now trying to get our IP address un-blocked. However this is provong tp be very difficult. Simply, i cannot get through to anyone who knows what to do, or even what im talking about. I have spoken to about 25 different people at microsoft and all i get is " this is out of scope for me, please try...." and get passed onto someone else.

I have filled in this form 5 times

https://support.msn.com/eform.aspx?productKey=edfsmsbl2&ct=eformts

and only get a reply saying the IP is blocked and they require more information. They dont specify what more information they require. when i reply to the email, all i get is a reply saying the team will get back to you within 24 hours. this never happens. i eventually got an email back once saying that it was an outlook deliverability problem and had to fill in a form to contact them, the same form i had filled in in the first place.

has anyone else ever experienced this and how did you get your IP address un-blocked? does anyone know of any other avenue's or contact details that may help me to get this IP un-blocked? or are there any other suggestions.

Thanks

Michael
motorhogAsked:
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VB ITSSpecialist ConsultantCommented:
I wish you the best of luck with this. We ran into a similar issue with our servers at the data center. We ended up having to route emails addressed to Hotmail and Windows Live addresses to another Exchange server using a different public IP address.

Basically ran into the same problem you did, tried to get in contact with Hotmail but got nowhere. As a lot of our clients require the ability to send to Hotmail addresses, we had to use the above workaround.
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suriyaehnopCommented:
What you had been thru was what i expected. I had issue with Yahoo mail. What I can do is just email with their complain template and HOPEFULLY they will rectify and give feedback but a year pass, I never received anything from them.

It is easier to deal with DNS BL like spamhous since they really take action on it.

If you have your user want to send an email to her colleague/business partner, it is better advice to send to another account as workaround since the issue out of your control.
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Gareth GudgerCommented:
I typically recommend going with a cloud based hygiene/filtering services for this very problem. For example Exchange Online Protection. Route all inbound and outbound through them. Never seen their IPs get blacklisted.
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motorhogAuthor Commented:
After several retries of the form, i finally got someone to reply that they had determined my ip could be unblocked.
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motorhogAuthor Commented:
just kept trying
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