ARC-Authentication-Results: i=1; mx4.messagingengine.com;
    x-csa=none;
    x-me-sender=none;
    x-ptr=pass smtp.helo=mout01.posteo.de policy.ptr=mout01.posteo.de;
    bimi=skipped (DMARC Policy is not at enforcement);
    arc=none (no signatures found);
    dkim=pass (2048-bit rsa key sha256) header.d=posteo.de
    header.i=@posteo.de header.b=EW5hKmBT header.a=rsa-sha256
    header.s=2017 x-bits=2048;
    dmarc=pass policy.published-domain-policy=none
    policy.applied-disposition=none policy.evaluated-disposition=none
    (p=none,d=none,d.eval=none) policy.policy-from=p
    header.from=posteo.de;
    iprev=pass smtp.remote-ip=185.67.36.65 (mout01.posteo.de);
    spf=pass smtp.mailfrom=alice@posteo.de
    smtp.helo=mout01.posteo.de
Authentication-Results: mx4.messagingengine.com;
    x-csa=none;
    x-me-sender=none;
    x-ptr=pass smtp.helo=mout01.posteo.de policy.ptr=mout01.posteo.de
Authentication-Results: mx4.messagingengine.com;
    bimi=skipped (DMARC Policy is not at enforcement)
Authentication-Results: mx4.messagingengine.com;
    arc=none (no signatures found)
Authentication-Results: mx4.messagingengine.com;
    dkim=pass (2048-bit rsa key sha256) header.d=posteo.de
      header.i=@posteo.de header.b=EW5hKmBT header.a=rsa-sha256
      header.s=2017 x-bits=2048;
    dmarc=pass policy.published-domain-policy=none
      policy.applied-disposition=none policy.evaluated-disposition=none
      (p=none,d=none,d.eval=none) policy.policy-from=p
      header.from=posteo.de;
    iprev=pass smtp.remote-ip=185.67.36.65 (mout01.posteo.de);
    spf=pass smtp.mailfrom=alice@posteo.de
      smtp.helo=mout01.posteo.de
From: <alice@posteo.de>
To: <alice@fastmail.com>