[sniffer] Re: yahoo mail problems

[Matrosity Hosting]

mx3 appears to respond Bill Foresman Matrosity Hosting www.matrosity.com 850.656.2644   From: Message Sniffer Community [mailto:[EMAIL PROTECTED] On Behalf Of Tech Support Sent: Tuesday, October 17, 2006 12:36 PM To: Message Sniffer Community Subject: [sniffer] Re: yahoo mail problems We were thinking of that approach but we run dedicated dns servers that are extremely high traffic so we would have to setup dns on each server as adding the zone to our true dns would cause lookup issues for other yahoo services     From: Message Sniffer Community [mailto:[EMAIL PROTECTED] On Behalf Of Colbeck, Andrew Sent: Tuesday, October 17, 2006 12:38 PM To: Message Sniffer Community Subject: [sniffer] Re: yahoo mail problems   I had a similar problem with Hotmail once upon a time; the details were different, but the remedy was the same.   I run a caching DNS server on my outbound DNS host, so I simply added a DNS zone for Yahoo.com on it, and populated only enough MX record information so that I could reliably get to just a few hosts.   The same dummy zone technique could be used here to consistently deliver mail to the same Yahoo! mail hosts and therefore their greylisting will work as they expect.   If you try it and it works, please let us know.   Andrew 8)       From: Message Sniffer Community [mailto:[EMAIL PROTECTED] On Behalf Of Tech Support Sent: Tuesday, October 17, 2006 9:12 AM To: Message Sniffer Community Subject: [sniffer] Re: yahoo mail problems Here’s what we have found so far   Yahoo is grey listing but instead of running a centralized GL database each of their servers has it’s own   A lookup for their MX shows   Mx1.mail.yahoo.com Mx2.mail.yahoo.com Mx3.mail.yahoo.com   So your server grabs one of these and does a lookup which returns a round robin response for mx1.mail.yahoo.com of   4.79.181.14 4.79.181.15 4.79.181.168 67.28.113.71 67.28.113.73 67.28.113.19   Each of which has a TTL of 1800   So your server tries one of these and gets deferred to try again.  It waits and tries again – but depending on your retry frequency TTL may have expired   And so the process starts over with a new MX1.mail.yahoo.com server     Not sure if this is all correct but it is the best we can figure out as of yet       From: Message Sniffer Community [mailto:[EMAIL PROTECTED] On Behalf Of Computer House Support Sent: Tuesday, October 17, 2006 12:11 PM To: Message Sniffer Community Subject: [sniffer] Re: yahoo mail problems   Now that I've looked into it further, yes! Our E-mails to Yahoo have also been bouncing back as undeliverable with the same error.   I have sent out a few test messages and will report back when I have some more info.     Michael Stein Computer House   ----- Original Message ----- From: Tech Support To: Message Sniffer Community Sent: Tuesday, October 17, 2006 11:52 AM Subject: [sniffer] Re: yahoo mail problems   Thanks, but were not blacklisted and there are no entries other than message has been deferred L     From: Message Sniffer Community [mailto:[EMAIL PROTECTED] On Behalf Of Computer House Support Sent: Tuesday, October 17, 2006 11:54 AM To: Message Sniffer Community Subject: [sniffer] Re: yahoo mail problems   I would recommend checking your mail server logs for a more detailed description of the bounce error.  You may find that it is a DNS or spam blacklist issue.  www.dnsstuff.com is a good resource.     Michael Stein Computer House   ----- Original Message ----- From: Tech Support To: Message Sniffer Community Sent: Tuesday, October 17, 2006 10:50 AM Subject: [sniffer] yahoo mail problems   I’m sorry to post this here but we are desperately looking for opinions quickly as this has becoming a real issue to us and I could not think of any better place to find truly technical mail server folks J     We seem to be having multiple mail servers on multiple networks having issues sending to yahoo servers for going on 36 hours now these are a variety of server types on a variety of networks telnet on port 25 is usually getting this 451 Message temporarily deferred - 4.16.50 keep in mind that some of our servers are having no issues sending mail any one else having this issue