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Bounce back only to one domain

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  • Bounce back only to one domain

    Hi, I'm having an issue sending to just one domain in particular. I've setup an SPF record and I've contacted the other IT department asking them to add our domain to the whitelist and they've done so but the bounce back continues. I've tried searching for answers but have come up with nothing. We're also not listed on any blacklists. We have Exchange.

    There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
    < #5.5.0 smtp;550-[SPF] is not allowed to send mail from >

    Thanks for your help!

  • #2
    Re: Bounce back only to one domain

    there's a problem with your SPF record, somehow
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