Reverse DNS does not match SMTP Banner
in [Sendmail]
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From: Steve on 13 Nov 2009 02:56 Hi, I have installed Sendmail on Centos 5.3 Recently, I made a test with http://mxtoolbox.com Apparently that seems to be OK, except that I have : Warning - Reverse DNS does not match SMTP Banner I tried to modify the sendmail file with : dnl SmtpGreetingMessage=mail.xxxx.com but apparently, nothing 's changed - Should I modify something else ? Thanks
From: MxToolBox Support on 13 Nov 2009 11:10 Steve, Thank you for using our SMTP Diagnostics tool (http:// www.mxtoolbox.com/diagnostic.aspx)! The short answer is that the reverse IP address name is not contained in the server HELO or EHLO banner. This is only a warning, and in some cases you may have no control over this. However, if you have the ability to make these match, you should. Some mail servers look for this and use it to mark messages you send as questionable. Most mail systems will not reject your messages outright, but this may effect your spam score increasing the likelihood your messages will be marked as spam. In other words, it is a best-practice you should endeavor to follow. It doesnt mean you are a bad person or wont be able to send email. Let us know if we can help with anything else. Thank you, MxToolBox On Nov 13, 1:56 am, Steve <St...(a)noreply.fr> wrote: > Hi, > > I have installed Sendmail on Centos 5.3 > Recently, I made a test withhttp://mxtoolbox.com > > Apparently that seems to be OK, except that I have : > Warning - Reverse DNS does not match SMTP Banner > > I tried to modify the sendmail file with : > dnl SmtpGreetingMessage=mail.xxxx.com > > but apparently, nothing 's changed > > - Should I modify something else ? > > Thanks
From: Steve on 13 Nov 2009 12:05 On Fri, 13 Nov 2009 08:10:12 -0800, MxToolBox Support wrote: > Steve, > > Thank you for using our SMTP Diagnostics tool (http:// > www.mxtoolbox.com/diagnostic.aspx)! The short answer is that the reverse > IP address name is not contained in the server HELO or EHLO banner. This > is only a warning, and in some cases you may have no control over this. > However, if you have the ability to make these match, you should. Some > mail servers look for this and use it to mark messages you send as > questionable. Most mail systems will not reject your messages outright, > but this may effect your spam score increasing the likelihood your > messages will be marked as spam. > > In other words, it is a best-practice you should endeavor to follow. It > doesn't mean you are a bad person or won't be able to send email. > > Let us know if we can help with anything else. > > Thank you, > MxToolBox > > > On Nov 13, 1:56 am, Steve <St...(a)noreply.fr> wrote: >> Hi, >> >> I have installed Sendmail on Centos 5.3 Recently, I made a test >> withhttp://mxtoolbox.com >> >> Apparently that seems to be OK, except that I have : >> Warning - Reverse DNS does not match SMTP Banner >> >> I tried to modify the sendmail file with : >> dnl SmtpGreetingMessage=mail.xxxx.com >> >> but apparently, nothing 's changed >> >> - Should I modify something else ? >> >> Thanks Hi MxtoolBox thanks for your reply. I would like effectively, decrease the risk to be considered as a Spam If i an improve the "SPAM SCORE " that would be great ! However, my problem is that I don't know how to change my configuration into Sendmail. - Any idea how to change it ? Thanks
From: Snuff on 16 Nov 2009 14:37 > > On Nov 13, 1:56 am, Steve <St...(a)noreply.fr> wrote: > > > >> I tried to modify the sendmail file with : > >> dnl SmtpGreetingMessage=mail.xxxx.com > > >> but apparently, nothing 's changed > > >> - Should I modify something else ? > > >> Thanks Try adding to your sendmail.mc: LOCAL_NET_CONFIG Djmail.xxxxx.com
From: Andrzej Adam Filip on 16 Nov 2009 14:59 Snuff <darryl(a)bikeslut.com> wrote: >> > On Nov 13, 1:56 am, Steve <St...(a)noreply.fr> wrote: >> > >> >> I tried to modify the sendmail file with : >> >> dnl SmtpGreetingMessage=mail.xxxx.com >> >> >> but apparently, nothing 's changed >> >> >> - Should I modify something else ? >> >> >> Thanks > > Try adding to your sendmail.mc: > LOCAL_NET_CONFIG > Djmail.xxxxx.com The following would be cleaner: #v+ define(`confDOMAIN_NAME',`mail.xxxxx.com') #v- URL(s): http://www.sendmail.org/m4/whoami.html -- [pl>en Andrew] Andrzej Adam Filip : anfi(a)onet.eu : Andrzej.Filip(a)gmail.com While your friend holds you affectionately by both your hands you are safe, for you can watch both of his. -- Ambrose Bierce, "The Devil's Dictionary"
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