Hey team, I've got an interesting SPF softfail occurring for one of our senders.
This softfail is readily repeatable and seems to be isolated to this single sender. All necessary records are in place, and their mail passes SPF at all major inbox providers other than gmail. Last resort seems to be a DNS lookup failure on Gmail's side. Can anyone see if I'm missing something silly? Thanks for your time! Below is a full header: > Delivered-To: luke.marti...@sendgrid.com > Received: by 10.37.10.5 with SMTP id 5csp545399ybk; > Tue, 17 Nov 2015 06:47:00 -0800 (PST) > X-Received: by 10.107.10.233 with SMTP id > 102mr38147900iok.31.1447771620037; > Tue, 17 Nov 2015 06:47:00 -0800 (PST) > Return-Path: <bounces+2035510-7255-luke.martinez= > sendgrid....@email.domain.com> > Received: from o1.mail_sg1.DOMAIN.com (o1.mail_sg1.DOMAIN.com. > [167.89.67.186]) > by mx.google.com with ESMTPS id > f11si24972237ioj.131.2015.11.17.06.46.59 > for <luke.marti...@sendgrid.com> > (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); > Tue, 17 Nov 2015 06:46:59 -0800 (PST) > Received-SPF: softfail (google.com: best guess record for domain of > transitioning bounces+2035510-7255-luke.martinez= > sendgrid....@email.domain.com does not designate 167.89.67.186 as > permitted sender) client-ip=167.89.67.186; > Authentication-Results: mx.google.com; > spf=softfail (google.com: best guess record for domain of > transitioning bounces+2035510-7255-luke.martinez= > sendgrid....@email.domain.com does not designate 167.89.67.186 as > permitted sender) smtp.mailfrom=bounces+2035510-7255-luke.martinez= > sendgrid....@email.domain.com; > dkim=pass header.i=@DOMAIN.com; > dmarc=pass (p=NONE dis=NONE) header.from=DOMAIN.com > DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=DOMAIN.com; > h=content-type:from:mime-version:subject:to; s=m1; > bh=9pEwAB7wqoG5R88T7P/hW0cn0vg=; b=nU5wIVQOhrCw9obvdFNePBXYVtVRZ > w4ZRkebUzg+gPmeOPPPVY97NnYUJvg0wSX4nxgoBZCeORxpfQgPGlurZbL4cbNDH > kVZJ85hrHCCNxe2mgqSj6WPES1BppblBwLeeCi3I4/YVMrZInckQ+EoBX/JtV+H8 > f1E8xty32c/sSQ= > Received: by filter0494p1mdw1.sendgrid.net with SMTP id > filter0494p1mdw1.32759.564B3DCA2A > 2015-11-17 14:46:34.302768619 +0000 UTC > Received: from MjAzNTUxMA (o16789125x222.outbound-mail.sendgrid.net > [167.89.125.222]) > by ismtpd0006p1iad1.sendgrid.net (SG) with HTTP id > Qc2SQ2SmT1GH_bTla6DiMg > for <luke.marti...@sendgrid.com>; Tue, 17 Nov 2015 14:46:34.248 +0000 > (UTC) > Content-Type: multipart/alternative; > boundary=3a3da2a7878431dd1b945889881ae3216018141f8c0222fd3cf0d5daa3b3 -- Luke Martinez SendGrid Deliverability Consultant 520.400.5693
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