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[Discuss] Strange sendmail (and postfix) spam issue: accepting fail "from" myself?

On 3/29/2016 1:24 PM, Derek Atkins wrote:
> smtpd_relay_restrictions =

This looks like the problem. Remove it entirely from your and
restart Postfix. This should bring the default rules which will block
relay attempts from anyone that does not match $mydestination or is not
an authenticated user.

Rich P.

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