I was switced to Cloudflare, but I had to switch back to my former DNS because I can’t use a mail redirect to get mail to my website. After resetting my former DNS to point to my web domain instead of Cloudflare, I ceased to receive emails at my website. Nothing has changed in my website DNS records. What I am wondering is, is Cloudflare somehow still holding on to my MX record? I deleted my website name from Cloudflare. It has been greater than 24 hours since I made the change.
The various mail logs show no activity. Here are the error messages returned from received mail:
Return-Path:
Received: from localhost (localhost)
by mailhost.mymailserver.com (8.15.2/8.14.5) id x0BDiSmN097765;
Fri, 11 Jan 2019 08:44:28 -0500 (EST)
(envelope-from MAILER-DAEMON)
Date: Fri, 11 Jan 2019 08:44:28 -0500 (EST)
From: Mail Delivery Subsystem
Message-Id: [email protected]
To: [email protected]
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
boundary=“x0BDiSmN097765.1547214268/mailhost.mailserver.com”
Subject: Returned mail: see transcript for details
Auto-Submitted: auto-generated (failure)
X-mailserver-Filters: Default delivery, no intercepts, 0 tags added
This is a MIME-encapsulated message
–x0BDiSmN097765.1547214268/mailhost.mailserver.com
The original message was received at Fri, 11 Jan 2019 08:44:28 -0500 (EST)
from out.myemailserver.com [66.203.85.62]
----- The following addresses had permanent fatal errors -----
[email protected]
################################################################################
----- Transcript of session follows -----
550 5.1.2 [email protected]… Host unknown (Name server: mail.mywebsite.net.: host not found)
################################################################################
–x0BDiSmN097765.1547214268/mailhost.myemailserver.com
Content-Type: message/delivery-status
Reporting-MTA: dns; mailhost.myemailserver.com
Received-From-MTA: DNS; out.mailserver.com
Arrival-Date: Fri, 11 Jan 2019 08:44:28 -0500 (EST)
Final-Recipient: RFC822; [email protected]
Action: failed
Status: 5.1.2
Remote-MTA: DNS; mail.mywebsite.net
Last-Attempt-Date: Fri, 11 Jan 2019 08:44:28 -0500 (EST)
–x0BDiSmN097765.1547214268/mailhost.myemailserver.com
Content-Type: text/rfc822-headers
Return-Path: [email protected]
Received: from out.mailserver.com (out.mailserver.com [66.203.85.62])
by mailhost.myemailserver.com (8.15.2/8.14.5) with ESMTPS id x0BDiSmO097763
(version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO)
for [email protected]; Fri, 11 Jan 2019 08:44:28 -0500 (EST)
(envelope-from [email protected])
Received: from localhost (localhost[127.0.0.1])
(authenticated bits=0)
by smtp (5.7.4/5.7.4) with ESMTPA id x0BDiSRW018566
for [email protected]; Fri, 11 Jan 2019 08:44:28 -0500 (EST)
(envelope-from [email protected])
Received: from HTTP
by 127.0.0.1 with HTTP;
Fri, 11 Jan 2019 08:44:28 -0500
Message-ID: MTAwMDA0My54MDAwNw.1547214268@quikprotect
Date: Fri, 11 Jan 2019 08:44:28 -0500
Subject: TEST_2019-01-11_0744 ff
From: [email protected]
To: [email protected]
MIME-Version: 1.0
Content-Type: text/plain;charset=iso-8859-1
Content-Transfer-Encoding: 8bit
Importance: Normal
–x0BDiSmN097765.1547214268/mailhost.myemailserver.com–
not 
. But just checked… you have that and it appears to resolve identically when querying Cloudflare’s nameservers directly as it does when querying the current nameservers.