For further assistance, please send mail to postmaster. The following address(es) failed, 15] Our system has detected that this message is, https://support.google.com/mail/answer/188131, for more information. I highly suggest speaking with Ntelos to see what’s going on. The following address(es) failed: [email protected]No Such User Here —— This is a copy of the message, including all the headers. These messages tell you why the mail delivery didn’t work. I looked at the history of the account, and there was previous problems with queued items with ntelos. Human error, i.e. I have been trying to track down this problem for awhile. Sent: Wednesday, October 28, 2015 2:56 PM, retry time not reached for any host after a long failure period, —— This is a copy of the message, including all the headers. A mail can be undeliverable for the reasons mentioned below: If the mail item carries an Incomplete, illegible, or incorrect address. It means that the recipient you’re trying to send the message to cannot accept any further messages until it has been cleared. However that e-mail address doesn’t exist on the RemoteDomain.com mail server, so it’s always going to fail and cause a bounce-back error. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. The content of the returned email is the same as what we sent so seems not to be spoofing, but is it somehow that our server is sending a duplicated of the email to some unknown address? When Postfix (or generally any MTA) generates a DSN (the "Undelivered Mail Returned to Sender" mail) it means that something went wrong with delivering the mail. You can read our previous article on why does email bounce, bounceback, or error? (If you want to learn more about email spoofing, Lifehacker has a good article covering the details.). We've listed the most common error messages below, along with suggested resolutions. <<< 550 5.1.1 … User unknown IMAP Issues Affecting Outlook 2013 and Office 365, PHP mail() Function Code to Send Emails from a Form, How to Troubleshoot Problems Receiving Email, How to Check your Email with Microsoft Outlook 2007, How to Create an Email Signature in RoundCube, How to Setup an Email Forwarder in cPanel & Webmail, https://support.google.com/mail/answer/81126#authentication, https://support.google.com/mail/?p=DisabledUser, How InMotion Hosting Builds Better OpenStack Deployments, Building Accessible WordPress Contact Forms with Contact Form 7: Accessible Defaults, How to Install PHP on a Linux Cloud Server, Check the spelling of the email address for. Reading these error messages can tell you exactly what the problem is, so if you call support you can then tell them exactly what’s happening. This is usually due to lack of compliance with postal regulations, an incomplete address and return address, or the inability to forward the mail when both correspondents move before the letter can be delivered. Takeaway: There’s not much you can do to stop this; thankfully, modern email apps and services do a good job of catching spoofed email addresses. In other words, it affects incoming email to 217.70.178.86 not outgoing. I am recently receiving "Undelivered Mail Returned to Sender" but only for Microsoft emails (hotmail, outlook, live). These messages will vary depending on the systems involved in the delivery of the e-mail. Hello, On Roundcube I seem to be having a sporadic issue. : That’s exactly what Block Sender does. This one’s interesting because you’re not the one sending the initial email. Delivery failed to the following recepients or groups: panos@gr.gr There was a problem delivering this message. To reduce the amount of spam sent, 550-5.7.1 to Gmail, this message has been blocked. I am using the browser interface to gmail. The answer is 'take action'. delete your own text from the attached returned message. A spammer attempted to leave a comment on one of their posts and the WordPress administrator of this site has set up their e-mail account as [email protected]. Content-Transfer-Encoding: quoted-printable,