Right, and this is the downside of free email services like Yahoo, Hotmail etc.
>From what you have described the email has gone missing AFTER receipt of the email by the recipient server. There are several things you can do to improve deliverability of your server in general, such as feedback loops, DMARC etc. but as for this individual mail I can only suggest following Yahoo Mail deliverability FAQs: https://help.yahoo.com/kb/SLN24439.html David From: community@mailsbestfriend.com [mailto:community@mailsbestfriend.com] On Behalf Of Martin Margheim Sent: Wednesday, January 20, 2016 1:10 PM To: community@mailsbestfriend.com Subject: [MBF] Re: Mail Delivery to Public Services Yes, David, answers have been provided However, it still means non-delivery of email, even if it is the 'other guy' Are there any ways of checking delivery of email from one account to another that might provide feedback from more than just delivering server logs? From: community@mailsbestfriend.com <mailto:community@mailsbestfriend.com> [mailto:community@mailsbestfriend.com] On Behalf Of David Barker | Mail's Best Friend | 1-866-919-2075 Sent: Wednesday, January 20, 2016 1:58 PM To: community@mailsbestfriend.com <mailto:community@mailsbestfriend.com> Subject: [MBF] Re: Mail Delivery to Public Services Martin, I believe this question has already been answered in a previous post to this list: "..it could be the recipient mail server, their anti-spam/av system, the email client, the email clients anti-spam/av system, or just a PEBKAC" David From: community@mailsbestfriend.com <mailto:community@mailsbestfriend.com> [mailto:community@mailsbestfriend.com] On Behalf Of Martin Margheim Sent: Wednesday, January 20, 2016 12:51 PM To: community@mailsbestfriend.com <mailto:community@mailsbestfriend.com> Subject: [MBF] Mail Delivery to Public Services If I understand the public industry, a number public email services are actually handled by Yahoo. I believe SBCGLOBAL, AT&T and other AT&T related public email services. Perhaps others are being handled by Yahoo as well. At issue and the prompt of this email is email from my SmarterMail server with Declude installed and the ARM Sniffer operational, email from a particular email address on one of the email domains does not have received by Yahoo and other public accounts. Other email accounts on the same email domain can send mail to a Yahoo email address and have it received. Thus, I do not believe the issue is domain related. The server logs show email from the subject account are delivering mail and a 250 resp is provided. The log indicated the email was delivered. However, the mail is never received by the recipients. Any suggestions or clues as to where and how to look for reasons? There is no rejection of email, no bounce, no non-deliverables. The email is simply disappearing. Thoughts? Martin Margheim Independent PC Consultant ad...@kodot.com <mailto:ad...@kodot.com> 727-365-3372