Am 16.05.2014 21:03, schrieb Oscar del Rio: > On 05/13/14 03:02 PM, Stephan Bosch wrote: >> >> Use of NULL envelope sender is generally recommended to prevent mail loops > > Unfortunately, many servers out there reject emails with NULL sender. > Some recent examples (real server names edited)
*that* are not compliant mailservers - period they also break sender verification and what not else
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