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A comment on GitHub Community Forum. Parent comment

Re:GitHub Community Forum by 3pt14159 on Tuesday November 14, 2017 @08:21AM (#15694714)
And I take it using a separate subdomain wont work either? I.E. if you send mail from [email protected] it will still hurt [email protected] so they need to get a different domain?
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Re:GitHub Community Forum by Posibyte on Tuesday November 14, 2017 @11:18AM (#15696339)
It depends on how spam filters are configured, but yes, subdomains can harm root domain's reputations. However, it's generally seen as OK to use subdomains to mitigate reputations being spread to the main domain. As long as you have your records in order to show what's going on, using a subdomain is usually OK.[1]

[1]: http://www.magillreport.com/Spamhaus-Provides-Answers-Part-F...

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