At 13:59 12/10/2009 Monday, Jonathan Lumb wrote:
>Thanks for the quick response.
>
>I did know we were using Murphx.net as a mail relay so I should have mentioned that in my post. Apologies for that. During my testing I did an include for murphx but they use so many servers I couldn't pin it down and as Vic points out, they may not carry an SPF. Would I be best not using Murphx as a relay?
you could do that
or build a list of their delevering ips /ranges yourself {trial and error as they shouldn't take long or include the /24/23... they use for mailservers}
or add ptr:Murphx.net and allow all their valid servers and a few invalid ones to pass
or add prt:edge-c.Murphx.net if tests show all their mail servers to be within this ptr sub=domain
i would be tempted to take up the offer of bounce a bunch of testmails to me {or yourself via gmail/wherever
and that way get a profile of likely source matches for murphx.net
adding their ips as ranges shouldn't be an issue if they are trusted by you not to be trying to forge anything from you, if they arn't trusted using them as a relay would be bad ;)
or if vics mate can get a list of ip's / ranges it would be fine to directly add those to your spf
>Thanks
>
>Jonathan
>
>Jonathan Lumb
>IT Technician
>
>The Virtual College
>Tel:01943 605976
>Fax:01943 605522
>
>www.virtual-college.co.uk
>
>With over 10 years' experience and over 150,000 on-line and face to face learners, Virtual College is enhancing the learning experience by accelerating the adoption of e-learning.
>
>We are proud of our Investors in People, CPD UK, Matrix, Customer First recognition and Winner of the Medilink Partnership with the NHS Award 2008
>
>Virtual College is a limited company registered in England and Wales, a division of Virtual College Group plc.
>Registered Office: Marsel House, Stephensons Way, Ilkley, LS29 8DD
>Reg No: 3052439 VAT No: GB75529689
>
>The information contained in this email is intended only for the named recipient(s). It may contain confidential information and if you are not an intended recipient you must not copy, distribute or take action or reliance on it. If you received this email in error, please contact us immediately, Any unauthorised disclosure of the information contained in this communication is strictly prohibited.
>
>
>-----Original Message-----
>From: Vic [mailto:spf1@beer.org.uk]
>Sent: 12 October 2009 13:48
>To: spf-help@v2.listbox.com
>Subject: Re: [spf-help] Setting up SPF
>
>
>> Our on-site exchange server has a public address of 94.30.116.48
>>
>> Our MX are mail.virtual-college.co.uk, mail2.virtual-college.co.uk and
>> telewest.virtual-college.co.uk
>>
>> Any mail sent from the exchange server results in a softfail.
>
>That's because the rest of the world doesn't see that address - you're
>relaying all your outgoing mail via murphx.net.
>
>Sadly, it looks like Murphx don't have an SPF record - I'll take a look at
>that (one of their sysads is a personal friend of mine).
>
>But the problem you've got is that anyone receiving mail from you is
>actually getting it from Murphx, who aren't mentioned in your SPF record.
>That's why you get the fail...
>
>The solution is either to send mail directly, or to get murphx added to
>the record.
>
>Vic.
>
>
>
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>Thanks for the quick response.
>
>I did know we were using Murphx.net as a mail relay so I should have mentioned that in my post. Apologies for that. During my testing I did an include for murphx but they use so many servers I couldn't pin it down and as Vic points out, they may not carry an SPF. Would I be best not using Murphx as a relay?
you could do that
or build a list of their delevering ips /ranges yourself {trial and error as they shouldn't take long or include the /24/23... they use for mailservers}
or add ptr:Murphx.net and allow all their valid servers and a few invalid ones to pass
or add prt:edge-c.Murphx.net if tests show all their mail servers to be within this ptr sub=domain
i would be tempted to take up the offer of bounce a bunch of testmails to me {or yourself via gmail/wherever
and that way get a profile of likely source matches for murphx.net
adding their ips as ranges shouldn't be an issue if they are trusted by you not to be trying to forge anything from you, if they arn't trusted using them as a relay would be bad ;)
or if vics mate can get a list of ip's / ranges it would be fine to directly add those to your spf
>Thanks
>
>Jonathan
>
>Jonathan Lumb
>IT Technician
>
>The Virtual College
>Tel:01943 605976
>Fax:01943 605522
>
>www.virtual-college.co.uk
>
>With over 10 years' experience and over 150,000 on-line and face to face learners, Virtual College is enhancing the learning experience by accelerating the adoption of e-learning.
>
>We are proud of our Investors in People, CPD UK, Matrix, Customer First recognition and Winner of the Medilink Partnership with the NHS Award 2008
>
>Virtual College is a limited company registered in England and Wales, a division of Virtual College Group plc.
>Registered Office: Marsel House, Stephensons Way, Ilkley, LS29 8DD
>Reg No: 3052439 VAT No: GB75529689
>
>The information contained in this email is intended only for the named recipient(s). It may contain confidential information and if you are not an intended recipient you must not copy, distribute or take action or reliance on it. If you received this email in error, please contact us immediately, Any unauthorised disclosure of the information contained in this communication is strictly prohibited.
>
>
>-----Original Message-----
>From: Vic [mailto:spf1@beer.org.uk]
>Sent: 12 October 2009 13:48
>To: spf-help@v2.listbox.com
>Subject: Re: [spf-help] Setting up SPF
>
>
>> Our on-site exchange server has a public address of 94.30.116.48
>>
>> Our MX are mail.virtual-college.co.uk, mail2.virtual-college.co.uk and
>> telewest.virtual-college.co.uk
>>
>> Any mail sent from the exchange server results in a softfail.
>
>That's because the rest of the world doesn't see that address - you're
>relaying all your outgoing mail via murphx.net.
>
>Sadly, it looks like Murphx don't have an SPF record - I'll take a look at
>that (one of their sysads is a personal friend of mine).
>
>But the problem you've got is that anyone receiving mail from you is
>actually getting it from Murphx, who aren't mentioned in your SPF record.
>That's why you get the fail...
>
>The solution is either to send mail directly, or to get murphx added to
>the record.
>
>Vic.
>
>
>
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>
>
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