SRS/SPF Help Needed
"Andy Shellam" <[email protected]> Mon, 10 Jul 2006 11:56:58 +0100
| Newsgroups | gmane.mail.spam.srs.general |
|---|---|
| Organization | the mail network |
| Message-ID | <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAAC4AAAAAAAAAt+qV6pqKPEmXG74TlFgX5gEAlpDSN+DrMEWnumhoRHpQKQAAAbLc9wAAEAAAANV47vykJGdCuzOqcL82k0ABAAAAAA==@andycc.net> |
This is a multi-part message in MIME format. ------=_NextPart_000_0032_01C6A417.F2F23340 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hi, I need some advice off people who know about SRS! I'm designing a complete mail solution system based largely on open-source products with custom tweaks, to support SPF, SRS and other validation schemes (such as DomainKeys) out-of-the-box. However, I'm having a little trouble under-standing the reasoning for requiring SRS. As an example: My company's domain is mailnetwork.co.uk, which has an SPF record, authorising the machines exchange.mailnetwork.co.uk (88.208.192.113, 88.208.192.114) and dns.mailnetwork.co.uk (84.18.200.160) to send mail from mailnetwork.co.uk, and to fail any other servers that attempt to do so. Now, how does SRS come in to this? All my current users use one of our registered domains (mailnetwork.co.uk and andycc.net are currently the two most-used) as their sender addresses - they are allowed incoming aliases (e.g. [email protected] is an alias for [email protected]) - however, if a user tries to use an alias as the sender address it is rewritten to the alias' destination address - e.g. if I tried to send using a From: address of [email protected], the mail server will rewrite it as [email protected]. When it gets off the ground, users will have the ability to add their own domains to the system - I'm guessing in this case, the system will act as a forwarder, and I'm thinking this is where SRS comes in, but I'm a tad confused how SPF breaks forwarding and the like!! Any advice/explanations would be appreciated! Thanks, Andy ------- To unsubscribe, change your address, or temporarily deactivate your subscription, please go to http://v2.listbox.com/member/[email protected] ------=_NextPart_000_0032_01C6A417.F2F23340 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns=3D"http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=3DContent-Type content=3D"text/html; charset=3Dus-ascii"> <meta name=3DGenerator content=3D"Microsoft Word 11 (filtered medium)"> <style> <!-- /* Font Definitions */ @font-face {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman";} a:link, span.MsoHyperlink {color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {color:purple; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-compose; font-family:Arial; color:windowtext;} span.metitle1 {font-family:Tahoma; font-weight:bold;} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.Section1 {page:Section1;} --> </style> <!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--> </head> <body lang=3DEN-US link=3Dblue vlink=3Dpurple> <div class=3DSection1> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'>Hi,<o:p></o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'><o:p> </o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'>I need some advice off people who know about SRS!<o:p></= o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'>I’m designing a complete mail solution system based largely on open-source products with custom tweaks, to support SPF, SRS and other validation schemes (such as DomainKeys) out-of-the-box.<o:p></o:p></s= pan></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'><o:p> </o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'>However, I’m having a little trouble under-standing the reasoning for requiring SRS.<o:p></o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'><o:p> </o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'>As an example:<o:p></o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'><o:p> </o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'>My company’s domain is mailnetwork.co.uk, which ha= s an SPF record, authorising the machines exchange.mailnetwork.co.uk (88.208.192.113, 88.208.192.114) and dns.mailnetwork.co.uk (84.18.200.160) = to send mail from mailnetwork.co.uk, and to fail any other servers that attemp= t to do so.<o:p></o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'><o:p> </o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'>Now, how does SRS come in to this?<o:p></o:p></span></fo= nt></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'><o:p> </o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'>All my current users use one of our registered domains (mailnetwork.co.uk and andycc.net are currently the two most-used) as their sender addresses – they are allowed incoming aliases (e.g. <a href=3D"mailto:[email protected]">[email protected]</a> is an ali= as for <a href=3D"mailto:[email protected]">[email protected]</a>) – however, if= a user tries to use an alias as the sender address it is rewritten to the ali= as’ destination address – e.g. if I tried to send using a From: address o= f <a href=3D"mailto:[email protected]">[email protected]</a>, the mail server will rewrite it as <a href=3D"mailto:[email protected]">[email protected]= t</a>.<o:p></o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'><o:p> </o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'>When it gets off the ground, users will have the ability= to add their own domains to the system – I’m guessing in this case, the system will act as a forwarder, and I’m thinking this is where SRS comes in, but I’m a tad confused how SPF breaks forwarding and the li= ke!!<o:p></o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'><o:p> </o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'>Any advice/explanations would be appreciated!<o:p></o:p>= </span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'><o:p> </o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'>Thanks,<o:p></o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'><o:p> </o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'>Andy<o:p></o:p></span></font></p> <p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:1= 0.0pt; font-family:Arial'><o:p> </o:p></span></font></p> <p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span style=3D= 'font-size: 12.0pt'><o:p> </o:p></span></font></p> </div> <HR> To unsubscribe, change your address, or temporarily deactivate your subscri= ption,=20 please go to <A HREF=3D"http://v2.listbox.com/member/?listname=3Dsrs-discus= [email protected]">http://v2.listbox.com/member/[email protected]= istbox.com</A> </body> </html> ------=_NextPart_000_0032_01C6A417.F2F23340--