Hi Jake,
Thanks for that. We are the ISP, however they have moved their email (they had a hosted Plesk box n our data centre) to rackspace or appriver not sure the customers are an American company and we are based in UK so not sure who it is exactly they are using - but we have the DNS for their domain. I know some of the larger ISP's in UK seem to ignore the TTL's (Plusnet are the main ones I have problems with, had several problems with them in past). The customer in the UK branches uses our ADSL and SDSL services and therefore our DNS - which is why I didn't understand the problem I was having. I'll try restarting the named service on the toaster and see if that solves the problem. If not I'll post the domain name. Thanks again Chris _____ From: Jake Vickers [mailto:[EMAIL PROTECTED] Sent: 14 May 2008 11:44 To: qmailtoaster-list@qmailtoaster.com Subject: Re: [qmailtoaster] DNS Refresh? Chris Bird wrote: Hello List, Just wondering if someone could help? I have a qmailtoaster running on CentOS 4.5 and I have a problem sending mail to a customer, they use our DNS Servers for their DNS and recently (about 9 days ago) they changed their DNS records for email however when I try to send them an email I get a bounce back from my toaster saying the message couldn't be sent due to remote host not accepting the mail - the problem is it is trying to send mail to pervious mail server not the new one. Im sure this is a DNS problem, is there anyway I can refresh DNS on the toaster like you do in XP ipconfig /flushdns? The TTL has been and gone on the updated record and I know the record has changed because the record is hosted on our servers. Any help much appreciated Thanks Chris "service named restart" will flush the DNS. You need to look at where your machine is getting the DNS information from (it will use the name servers located in /etc/resolv.conf). If you're using a "big ISP" they may be caching longer than they are supposed to (T-Mobile's wireless caches DNS info for 12 days, regardless of what you set the TTL as). You may also want to post the domain name to us here on the list or use a tool like dnsstuff.com to make sure that DNS was done correctly.
