On April 4, 2020 7:26:05 PM UTC, calder <calder....@gmail.com> wrote:
>m
>
>On Sat, Apr 4, 2020, 14:14 Frank Tornack <y...@dreamofjapan.de> wrote:
>
>> Good evening,
>> I have a question about your e-mail address. Why does the address end
>> on com.INVALID? How do you get such an address?
>>
>
>That question is off topic.

Subject line adjusted accordingly.

>The invalid is too avoid spam email

No it isn't. And to side track for a moment it is very unhelpful to state 
something as a fact when it is, at best, an educated guess. Especially when, as 
in this case, that guess is wrong. Guesses can be acceptable responses to 
questions on this list but it must be made clear to readers that it is a guess 

The .INVALID is added by the ASF mailing list software (strictly a custom 
extension written by the ASF does this) when the originator posts from a domain 
that has a strict SPF record. If the ASF didn't do this, recipients that check 
SPF records would reject the mail as the originator's domain will not list the 
ASF mail servers as permitted senders for the originator's domain.

In short, .INVALID is added to make sure the message is received by all 
subscribers.

Mark

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