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On 14/10/16 13:04, Richard Brown wrote:
BT's email system is piss poor. I come across this sort of issue all the time. What SMTP server are you sending email from? Is it a commercial SMTP supplier or your ISP? If it's your ISP, they're likely to be on a blacklist [http://mxtoolbox.com/blacklists.aspx] Test your company domain too, it may have found itself on a list somehow. Take a serious look at DKIM and SPF for your company domain |
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