Router Task: Failed to connect to SMTP host yahoo.com
I have a lot of emails that are intended to go to yahoo email address sitting on the Mailbox. Those has been there for about 2 days and I still don't know why it didn't get send out. Sometimes it works sometimes it doesn't, most of the time it doesnt.
The error on the mail routing event say: Router: Failed to connect to SMTP host YAHOO.COM because The remote server is not a known TCP/IP host.
Other domain addresses work just fine. Any idea what the problem is?
We use Domino 7
The error on the mail routing event say: Router: Failed to connect to SMTP host YAHOO.COM because The remote server is not a known TCP/IP host.
Other domain addresses work just fine. Any idea what the problem is?
We use Domino 7
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You have found the reason for the rejected emails: Yahoo considers your email domain's reputation poor or risky. The most likely underlying reason, besides the obvious like SPAM email or infected mail, is that something in your DNS/MX configuration is damaging your mail reputation on the Internet. Use mxtoolbox for checking your MX records and making especially sure that your reverse DNS for your MX record is working. There is much literature on the Internet about good email reputation practice.
I scanned the ports on one of Yahoo's MX servers (a.mx.mail.yahoo.com) and the scan was successful. Since they have the IP address associated with your domain and that domain is considered a risk, they would block you in fear of a Denial of Service (DoS) attack.
I scanned the ports on one of Yahoo's MX servers (a.mx.mail.yahoo.com) and the scan was successful. Since they have the IP address associated with your domain and that domain is considered a risk, they would block you in fear of a Denial of Service (DoS) attack.
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We have 2 or 3 users in the company that sets up their email to auto forward the email to their yahoo emails and that might be the cause.
I am in the process of completing the form here: http://help.yahoo.com/l/us/yahoo/mail/postmaster/defer.html
What would be a good practice here if this gets resolved. Should I tell the users to not forward all the emails to their yahoo emails?
I am in the process of completing the form here: http://help.yahoo.com/l/us/yahoo/mail/postmaster/defer.html
What would be a good practice here if this gets resolved. Should I tell the users to not forward all the emails to their yahoo emails?
Yes, I would stop using that method in order to avoid raising flags. It is better to give these people remote access to their email either via POP3 (Outlook Web Access or Lotus Web Mail) or a mobile device, not least because forwarding company property (company email) to a personal account could raise compliance issues.
But also be sure to check your DNS setup, as mentioned earlier. That's the most common reason.
But also be sure to check your DNS setup, as mentioned earlier. That's the most common reason.
I agree with bluemeIn, it definitely seems to be blacklisting of your public IP registered for your MX record. To overcome, you can change the public IP associated with the MX record, hope that will resolve the issue.
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I got a reply from Yahoo Cust Serv. Basically it's saying that Yahoo cut the connection temporarily to our domain because we're sending a lot of emails at the same time to Yahoo domain which happened in the morning when we lost our internet connection and when got our internet back, the emails that were held were trying to go out in a close time range.
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2. I attached the error message. I will check the website the message refers to, but at this point any idea why yahoo is not allowing email with SMTP?
Yahoo-Error.bmp