Hi, using Exchange 365 and GMAIL is bouncing all emails -- unsolicited email from your IP address

Anonymous
2023-09-09T15:18:02+00:00

I did all the domain checks and everything is checking out fine. SPF and reverse DNS are all correct.

"Remote server returned '550 5.4.300 Message expired -> 421 4.7.28 [2a01:111:f403:7052::701 15] Our system has detected an unusual;rate of unsolicited mail originating from your IP address. To;protect our users from spam, mail sent from your IP address has been;temporarily rate limited. Please visit; https://support.google.com/mail/?p=UnsolicitedRateLimitError to"

Is there a problem on the MS IP addresses right now?

Microsoft 365 and Office | Subscription, account, billing | For business | Other

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  1. Anonymous
    2023-09-22T07:59:40+00:00

    Earlier on in this thread the MS support rep opted out as there was no response from the original poster. I suspect it would be best to start a new thread.

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  2. Anonymous
    2023-09-22T08:14:25+00:00

    Hi Everyone,

    One of my colleagues just found this and we tried for 1 of our customers and it worked, we're implementing it for all our customers right now.

    Configuring Dmarc & DKIM:

    Dmarc: ADD TXT record to your dns management

    • domain name: _dmarc.yourdomain.com. (.com/be/org...)
    • txt-record: v=DMARC1; p=none; pct=100; rua=mailto:@yourdomain.com; ruf=@yourdomain.com;fo=1:d:s

    DKIM:

    https://www.alitajran.com/configure-dkim-record-for-office-365/

    ADD CNAME record:

    • domain name: selector1._domainkey.yourdomain.com.
    • caronical name record: selector1-yourdomain.com._domainkey.yourdomain.onmicrosoft.com

    ADD CNAME record (second):

    • domain name: selector2._domainkey.yourdomain.com.
    • caronical name record: selector2-yourdomain._domainkey.yourdomain.onmicrosoft.com

    check the link above to enable it in O365 Admin.

    Kind Regards,

    Benjamin.

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  3. Anonymous
    2023-09-22T08:15:09+00:00

    Hi Everyone,

    One of my colleagues just found this and we tried for 1 of our customers and it worked, we're implementing it for all our customers right now.

    Configuring Dmarc & DKIM:

    Dmarc: ADD TXT record to your dns management

    • domain name: _dmarc.yourdomain.com. (.com/be/org...)
    • txt-record: v=DMARC1; p=none; pct=100; rua=mailto:@yourdomain.com; ruf=@yourdomain.com;fo=1:d:s

    DKIM:

    https://www.alitajran.com/configure-dkim-record-for-office-365/

    ADD CNAME record:

    • domain name: selector1._domainkey.yourdomain.com.
    • caronical name record: selector1-yourdomain.com._domainkey.yourdomain.onmicrosoft.com

    ADD CNAME record (second):

    • domain name: selector2._domainkey.yourdomain.com.
    • caronical name record: selector2-yourdomain._domainkey.yourdomain.onmicrosoft.com

    check the link above to enable it in O365 Admin.

    Kind Regards,

    Benjamin.

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  4. Anonymous
    2023-09-22T10:24:27+00:00

    Benjamin

    I am not a very skilled 365 person. We're a small business and make do with what we have. Can you give me some additional detail where to find Dmarc and DKIM. Im embarrassed to say I don't even know what they are, but if you all have solved this, I certainly want to follow your lead. In grateful thanks.

    Bob

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  5. Anonymous
    2023-09-22T10:35:54+00:00

    Hi Bob,

    No problem: Dmarc & DKIM are additional verifications (security) required by some mailservers, looks like google require this now and microsoft has no idea of it.

    You can find the DKIM you need if you follow those steps: https://www.alitajran.com/configure-dkim-record-for-office-365/

    Once you get those:

    • Go to your dns hosting settings (yourdomain.org/com/be/whatever),
    • On your dns hosting settings you have to add DNS-record

    Like this:

    Dmarc: ADD TXT record to your dns management

    • domain name: _dmarc.yourdomain.com. (.com/be/org...)
    • txt-record: v=DMARC1; p=none; pct=100; rua=mailto:@yourdomain.com; ruf=@yourdomain.com;fo=1:d:s

    DKIM:

    https://www.alitajran.com/configure-dkim-record-for-office-365/

    ADD CNAME record:

    • domain name: selector1._domainkey.yourdomain.com.
    • caronical name record: selector1-yourdomain.com._domainkey.yourdomain.onmicrosoft.com

    ADD CNAME record (second):

    • domain name: selector2._domainkey.yourdomain.com.
    • caronical name record: selector2-yourdomain._domainkey.yourdomain.onmicrosoft.com

    Hope this will help, maybe your domain-name is hosting by another company ? In this case you will have to contact them.

    Kind Regards,

    Benjamin.

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