Here are a few. Seems that email systems often want to block emails sent from Oxwall sites.
I have members who are registered on a Wordpress site of mine, and are also registered on an oxwall site of mine. Those members members are registered on both sites using their same email address. The always receive the emails sent from my wordpress site, they do NOT receive the emails sent from my oxwall site. And my Oxwall site emails always bounce.
Of course my wordpress site is on a different domain from the oxwall site. But both sites are sending to the same emails, but my members receive only emails sent from the wordpress site, and not the oxwall site. I end up seeing the bounces of those emails from oxwall in my inbox.
Reporting-MTA: dns; dex319.exmasters.com
X-Postfix-Queue-ID: 85B0118285D8
X-Postfix-Sender: rfc822; admin@planettickle.com
Arrival-Date: Thu, 13 Nov 2014 21:11:01 +0800 (HKT)
Final-Recipient: rfc822; fminfo1@me.com
Original-Recipient: rfc822;fminfo1@me.com
Action: failed
Status: 5.7.0
Remote-MTA: dns; mx1.mail.icloud.com
Diagnostic-Code: smtp; 550 5.7.0 Blocked - see
https://support.proofpoint.com/...gi?ip=89.185.234.128:
fminfo1@me.com
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Reporting-MTA: dns; dex319.exmasters.comX-Postfix-Queue-ID: A68A41828459X-Postfix-Sender: rfc822; admin@planettickle.comArrival-Date: Tue, 11 Nov 2014 09:35:01 +0800 (HKT)
Final-Recipient: rfc822; brycedouglass@icloud.comOriginal-Recipient: rfc822;brycedouglass@icloud.comAction: failedStatus: 5.7.0Remote-MTA: dns; mx4.mail.icloud.comDiagnostic-Code: smtp; 550 5.7.0 Blocked - see https://support.proofpoint.com/...89.185.234.128: brycedouglass@icloud.com
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Reporting-MTA: dns; dex319.exmasters.comX-Postfix-Queue-ID: 351B118283B7X-Postfix-Sender: rfc822; admin@planettickle.comArrival-Date: Sun, 9 Nov 2014 15:20:02 +0800 (HKT)
Final-Recipient: rfc822; gene_clark@att.netOriginal-Recipient: rfc822;gene_clark@att.netAction: failedStatus: 5.0.0Remote-MTA: dns; aln-mailrelay.att.netDiagnostic-Code: smtp; 521-89.185.234.128 blocked by sbc:blacklist.mailrelay.att.net. 521 DNSRBL: Blocked for abuse. See http://att.net/blocks
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Reporting-MTA: dns; dex319.exmasters.comX-Postfix-Queue-ID: E15CE18283D9X-Postfix-Sender: rfc822; admin@planettickle.comArrival-Date: Tue, 14 Oct 2014 08:06:02 +0800 (HKT)
Final-Recipient: rfc822; fminfo1@me.comOriginal-Recipient: rfc822;fminfo1@me.comAction: failedStatus: 5.7.0Remote-MTA: dns; mx1.mail.icloud.comDiagnostic-Code: smtp; 550 5.7.0 Blocked - see https://support.proofpoint.com/...89.185.234.128: fminfo1@me.com
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