Well I am not so sure. Our own email server should not require reverse lookup for a client logging in and sending email. That is the norm for an email server. Where PTR comes into play is when one email server sends an email to another server. So that reverse lookup should not happen on the initial send from a customer here to our own email server.
PTR entries are usually only enter for servers, especially email servers since that is a spam check. Think of a business. They don't have PTRs for every desktop in their enterprise. That would be a nightmare. Terri Kelley Network Engineer 254-697-6710 x 1140 Farm to Market Broadband www.farm-market.net This email message is intended only for the named recipient(s) above, and may contain, together with any attachment(s), confidential information that is privileged. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, copying or distribution of this message and any attachment(s) is strictly prohibited. On May 12, 2010, at 1:23 PM, Butch Evans wrote: > On Wed, 2010-05-12 at 12:37 -0500, Terri Kelley wrote: >> Really doubt it is my mail server. I have one customer >> complaining that it happens to him when using other smtp >> email servers. > > If you are natting, then DNS may still be the issue. If you ARE > natting, then do a reverse lookup on the IP that you are natting to. > I'd bet that you'll find there is no PTR record for that IP. > > > -- > ******************************************************************** > * Butch Evans * Professional Network Consultation* > * http://www.butchevans.com/ * Network Engineering * > * http://store.wispgear.net/ * Wired or Wireless Networks * > * http://blog.butchevans.com/ * ImageStream, Mikrotik and MORE! * > ******************************************************************** > > _______________________________________________ > Mikrotik mailing list > Mikrotik@mail.butchevans.com > http://www.butchevans.com/mailman/listinfo/mikrotik > > Visit http://blog.butchevans.com/ for tutorials related to Mikrotik RouterOS -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://www.butchevans.com/pipermail/mikrotik/attachments/20100512/6360187f/attachment.html> _______________________________________________ Mikrotik mailing list Mikrotik@mail.butchevans.com http://www.butchevans.com/mailman/listinfo/mikrotik Visit http://blog.butchevans.com/ for tutorials related to Mikrotik RouterOS
