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AWS EC2 Dedicated IP blocked by Outlook

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emailrelay
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  • R Offline
    R Offline
    rfg
    wrote on last edited by girish
    #1

    We have Cloudron as our email server hosted on AWS EC2, configured with an elastic IP (dedicated).

    However, since 4 weeks ago our mail is being blocked by Microsoft servers, apparently our IP is part of a network segment detected as spammers.

    I have registered the IP in some microsoft page without results.

    What other actions would you recommend that I take?

    I'm even considering migrate to another provider.

    thanks in advance.

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  • JOduMonTJ Offline
    JOduMonTJ Offline
    JOduMonT
    wrote on last edited by
    #2

    @rfg Yes it is possible, it could be a neighborhood situation
    you could try to understand from where your IP is blacklisted https://mxtoolbox.com/blacklists.aspx
    than ask for a deban such as https://www.spamhaus.org/lookup/ for an example

    but the best is to use a relay such as MailJet, SendGrid, MailGun, ...
    you may want to read this to understand a little bit more what is your situation.

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  • girishG Offline
    girishG Offline
    girish Staff
    wrote on last edited by
    #3

    @rfg You have to setup a mail relay for your outbound mails. The big cloud providers like aws, gce, azure will all block emails from VMs directly. See https://cloudron.io/documentation/email/#relay-outbound-mails

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