Hi guys, hope you all are doing fine in this times, the question in not a problem of ISP, but maybe some can help me. In our organization we have an area that gave the service for web hosting and emails for our clients (Also our self), but for some reason for the last two weeks, we can't send emails to Hotmail, Live , Outlook, or any Microsoft domain, we are able to send emails to any outside organization gmail, yahoo, custom domains, etc. the only exception are Hotmail, or Live, outlook, ... And we are doing this from our Own servers, with fixed IPs that also we check and everything is ok. Has anybody had this problem?, or anybody know how to fix it?. Thanks a lot.
This is old problem: https://answers.microsoft.com/en-us...k-domain/5c8d927c-533c-4c2a-8a61-28c4ce0cf600 Messages dont end up anywhere, no bounce no spamfolder, that sucks. If you add sender adress in hotmail webmail adressbook, it will be delivered. Check your SPF, DKIM, DMARC and Reverse DNS and so on. And and do create a SNDS account and add your IP's, that will help magically also: https://sendersupport.olc.protection.outlook.com/snds/FAQ.aspx
I agree this problem is quite common. Beside what @elmacus suggested, there is a complaint form for this kind of issues, I used it in the past and contacting them helped in my cases: https://support.microsoft.com/en-us/supportrequestform/8ad563e3-288e-2a61-8122-3ba03d6b8d75
@Th0m the emails get bounced back with this message: Code: -----Mensaje original----- De: Mail Delivery System <[email protected]> Enviado el: martes, 19 de mayo de 2020 10:19 a. m. Para: [email protected] Asunto: Undelivered Mail Returned to Sender This is the mail system at host server1.mydomain.com. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <[email protected]>: host hotmail-com.olc.protection.outlook.com[104.47.40.33] said: 550 5.7.1 Unfortunately, messages from [xx.xx.xx.xx] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [CO1NAM03FT031.eop-NAM03.prod.protection.outlook.com] (in reply to MAIL FROM command) @elmacus Thanks for the 2 links, i saw it yesterday and also i register and followed everything they said. @till Thanks for the response I fill that form yesterday, do you remember how much time they take to solve or response you? Thanks for all the messages.
