[issue2551388] SPF softfail for emails from issues.roundup-tracker.org

New submission from Christof Meerwald:

emails from this roundup instance fail SPF checks:

emails have an envelope-from of <[email protected]>, but the SPF policy for 
python.org does not allow emails to be sent from that server:

  H=bugs.nyc1.psf.io [167.71.181.142] Warning: SPF softfail

SPF record currently shows:

  v=spf1 mx a:mail.wooz.org ip4:188.166.95.178/32 ip6:2a03:b0c0:2:d0::71:1 include:stspg-
customer.com include:_spf.google.com include:mailgun.org ~all

----------
components: Infrastructure
messages: 8254
nosy: cmeerw
severity: normal
status: new
title: SPF softfail for emails from issues.roundup-tracker.org
type: behavior

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Roundup tracker <[email protected]>
<https://issues.roundup-tracker.org/issue2551388>
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