Oh no's! If this is accurate, Comcast's anti-spam is done by Symantec!
http://www.comcastblacklist.com/?page_id=6 On Fri, Mar 28, 2008 at 3:17 PM, Micheal Espinola Jr <[EMAIL PROTECTED]> wrote: > Someone posted a very good question to that 'A, MX, PTR' blog article > since I posted the link. For those that are unfamiliar with PTR and > HELO filtering by anti-spam filters, you might want to check out the > question and my response(s). > > On Fri, Mar 28, 2008 at 1:37 PM, Micheal Espinola Jr > <[EMAIL PROTECTED]> wrote: > > > Oh how I wish I had the time to be a "blogger", but I did make time to > > comment on DNS issues with anti-spam products: > > > > http://www.espinola.net/blog/archives/5 > > > > Summary: Make sure you have accurate A, MX, and PTR records for your > > outbound server. > > > > > > On Fri, Mar 28, 2008 at 10:10 AM, Sam Cayze <[EMAIL PROTECTED]> wrote: > > > > > So, do mean like having your PTR and reverse DNS setup correctly, or > > > something related to the nameservers? > > > > > > I will relay that info back to my provider. It seems another one of our > > > ISP's customer has also reported the same issue. > > > Good to know John, thanks. > > > -Sam > > > > > > -----Original Message----- > > > From: Matteson, John H Jr USA Mr USA 25th SigBN (ITT) > > > [mailto:[EMAIL PROTECTED] > > > Sent: Friday, March 28, 2008 1:58 AM > > > To: MS-Exchange Admin Issues > > > > > > Subject: RE: Help: Can't send to Comcast.net?!? > > > > > > Make sure that you have all the appropriate DNS entries on the external > > > DNS server. Comcast is getting twitchy about accepting mail form certain > > > netblocks and domains. My home is wired to Comcast and they sometimes > > > reject mail from my domain here. > > > > > > If you need to, contact Comcast's corporate headquarters and have them > > > help in resolving the problem. > > > > > > > > > John H. Matteson, Jr. > > > Systems Administrator/ITT Systems > > > FOB Orgun-E > > > Afghanistan > > > DSN - 318 431 8001 > > > VoSIP - (308) 431 - 0000 > > > Iridium - 717.633.3823 > > > Roshain - 079 - 736 - 3832 > > > > > > "A man who thinks of himself as belonging to a particular national group > > > in America has not yet become an American. And the man who goes among > > > you to trade upon your nationality is no worthy son to live under the > > > Stars and Stripes." Woodrow Wilson > > > > > > > > > -----Original Message----- > > > From: Sam Cayze [mailto:[EMAIL PROTECTED] > > > Sent: Friday, March 28, 2008 1:53 AM > > > To: MS-Exchange Admin Issues > > > Subject: Help: Can't send to Comcast.net?!? > > > > > > All emails to Comcast are building up in our Queues and triggering delay > > > notifications. > > > > > > This is what I have tried: > > > DNS Flush > > > Verify our dns cache for Comcast.net matches that reported on > > > dnsstuff.com. > > > > > > A telnet connection to Comcast MX servers times out/no response. (And a > > > few find folks on the nt-list verified for me that mx1.comcast.net is > > > indeed 'putting out'). > > > I tried a telnet right to the IPs too. > > > > > > I kind of figured we are blacklisted, but from what I have heard Comcast > > > will actually send you an NDR back with an abuse message. > > > Update: Just heard back from their abuse dept (in like 5 minutes - > > > damn!) - we are NOT blacklisted. > > > > > > > > > Ideas?!? ISP Problem? > > > > > > -Sam > > > > > > > > > > > > ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ > > > ~ http://www.sunbeltsoftware.com/Ninja ~ > > > > > > ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ > > > ~ http://www.sunbeltsoftware.com/Ninja ~ > > > > > > ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ > > > ~ http://www.sunbeltsoftware.com/Ninja ~ > > > > > > > > > > > -- > > ME2 > > > > > > ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ > > ~ http://www.sunbeltsoftware.com/Ninja ~ > > > > > > -- > ME2 > > ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ > ~ http://www.sunbeltsoftware.com/Ninja ~ > -- ME2 ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
