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JessIT2013Flag for Bahrain asked on

outlook issue

Hi,

I got this error when sending.

xxxx@XXx.com on 9/1/2013
you do not have permission to send to this recipient. for assistance, contact your system administrator.
<owa.mydomain.com #5.7.1 smtp; 550 5.7.1:127.0.0.5:Client host 81.22.19.169 blocked using 88.blocklist.zap; Mail from IP banned. To request removal from this list please forward this message to delist.forefront@messaging.microsoft.com

jessie
Microsoft ApplicationsOutlookInternet Protocols

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Last Comment
Postmaster

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
Mohammed Khawaja

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Postmaster

Check that you are sending from the IP that is listed for your MX domain.

ie. your domain (Xxx.com) mail MX shows IP 11.22.33.44
Send out using this IPm - so that recipient systems can verify your sending IP and domain are a match.
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