Forum Discussion
AmityWeb2021
Dec 22, 2021Copper Contributor
Trying to find help for 550 5.7.511 Access denied, banned sender
I run a mail server for many business clients of mine. Microsoft have blocked our IP address, so we cant send to Office365 email addresses. I get a bounce back saying: host cr-studio.mail.protec...
timbertens
Dec 27, 2021Copper Contributor
Are all of your servers facing this problem hosted on Linode? Ours are.... If so, please submit a ticket to the friendly people at Linode too. I hope that if there are enough tickets they will reach to MS at a higher level that they currently have and it gets solved quicker
AdvUserAdmin
Dec 30, 2021Copper Contributor
timbertens I have contacted Linode multiple times on this issue. To be honest, I am disappointed with their response. It seems there is nothing they can do.
I'm also not really getting anywhere with Microsoft so far. Hopefully this issue is now being escalated.
- suportecwDec 30, 2021Copper Contributor9 days and Microsoft doesn't answered us... The problem persist and we can't do anything to resolve it =/
- AdvUserAdminJan 01, 2022Copper Contributor
suportecw Microsoft have advised their servers currenly will not accept email from any Linode IP addresses....
- AmityWeb2021Jan 01, 2022Copper ContributorCould you explain this a bit more please? Where did you get this info? My other Linode servers send email ok (using a PHP mail script).
- AmityWeb2021Dec 30, 2021Copper ContributorI do have someone replying to me. They just have not been able to solve it. They have escalated it.
I have sent them a link to this thread and the other one above, so inform them others have the same issue originating about the same time.
In the meantime as I have my own mail server with Postfix, I have created a smtp.com account and configured postfix to send through that. My emails are now working as the smtp.com IP is not blocked by Microsoft. But I want this to be temporary, until my issue is fixed and reverted back.- bootahDec 30, 2021Copper Contributor
AmityWeb2021 How did you do that? perhaps that would be a solution until Microsoft wakes up from their deep slumber. Is there any documentation on how to setup a new smtp using a different IP?
I have had many responses from Microsoft saying they are escalating the issue, but nothing happens after that. very very disappointing.
Also I am sure that Linode IPs are all blocked because I have a server with Linode with no emails ever being sent from it for the past 2 years. I set up a totally new account and an unused brand new domain and tried to send to a Microsoft365 email account, it was blocked.
Linode should do something about this, as well as Microsoft. Otherwise I will have to just move to a different data center, perhaps DigitalOcean?