Mail relay
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Mail relay
05-01-2009 11:38 PM
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Re: Mail relay
06-01-2009 8:15 AM
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Re: Mail relay
06-01-2009 8:32 AM
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Quote As far as I know, PN does not impose or support a similar mechanism. Further, if PN does support such mail relay from PN-registered IP addresses (e.g. via PN broadband or from a PN customer dialling in), is it blocked when coming from a non-PN address (e.g. an internet kiosk) but using SMTP authentication?
You're right , PlusNET dont impose any restriction on the sending address. I have a domain which is not hosted with PlusNet and I have used that in the past as the sending address without any problems. I will have certainly sent mail this way from a PlusNet IP and almost certainly ( although cant be entirely sure !! ) I have done it from a none PlusNet IP using Authenticated SMTP.
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
Re: Mail relay
06-01-2009 8:34 AM
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If you connect from a non-PN connection (e.g. an other ISP) you can use the PN SMTP server provided you authenticate using your PN username and password (the main account username and password and not the individual mailbox credentials).
Re: Mail relay
06-01-2009 9:23 AM
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Quote from: pierre_pierre I thought your name was Decomplexity - What are you talking about in plain English
Made perfect sense to me and judging by the replies to MisterW and Paul03
I think there is a chance that the situation may change when they switch over to IronPort for the outgoing emails.
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: Mail relay
06-01-2009 10:15 AM
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Quote from: jelv I think there is a chance that the situation may change when they switch over to IronPort for the outgoing emails.
Sounds ominous, what do you know jelv?
I have a domain hosted elsewhere and use PN outgoing server to send out mail. Will this be lost, or will there be a way round that. How will we know when to implement it.
Re: Mail relay
06-01-2009 10:34 AM
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Re: Mail relay
06-01-2009 10:35 AM
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@pierre_pierre
DAK - Does anyone know
I too use Thunderbird but do need to use authentication when on a non-PN connection - are you sure you haven't got a username and password set for the SMTP server?
Re: Mail relay
06-01-2009 10:38 AM
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Quote from: pierre_pierre @ Jelv Re my first post, Bad night with my man cold, but have never seen the abbreviation DAK on this forum and didnt think to look it up,
You could have posted:
Quote DAK what DAK means?
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: Mail relay
06-01-2009 10:47 AM
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To argue with someone who has renounced the use of reason is like administering medicine to the dead - Thomas Paine
Re: Mail relay
06-01-2009 10:56 AM
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Quote I don't know what does anyone know means but I do know.
Re: Mail relay
06-01-2009 11:00 AM
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Quote from: Jameseh
Quote I didn't know what does anyone know means but I do now.
Fixed but close enough for a youngster. Well done James and a happy new year.
To argue with someone who has renounced the use of reason is like administering medicine to the dead - Thomas Paine
Re: Mail relay
06-01-2009 11:13 AM
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From http://community.plus.net/blog/2008/11/04/ironport_technical/
Quote One of the beauties of the IronPort devices we’ve purchased is the fact that they are perfectly capable email servers in their own right. We currently have 8 servers looking after outbound email. It’s these servers you connect to when you send a message to our outgoing mail server (relay.plus.net). What we’re going to do is decommission the existing servers and instead push all outbound messages through the Ironports. This work is scheduled to start once we’ve completed the migrations from Postini to IronPort.
Using IronPort for outbound email will bring with it a wealth of benefits. Firstly we’ll be able to introduce spam filtering on the outbound mail platform. This will drastically reduce support overheads where we have to ‘police’ the relay servers to make sure they’re not being abused by spammers. This is turn will reduce the likelyhood of us ending up on blacklists which can stop you from sending email to other people. The IronPorts offer support for DKIM which is a technique used to verify the authenticity of a particular email. This is good for the same reasons as outbound spam filtering and will help better the reputation of the Plusnet email platform. We’ll also be able to start offering secure SMTP over SSL which is something we know our customers have been asking after for a while. Moving to IronPort for outbound email allows us to further reduce the number of servers we’re using, and also takes traffic away from Sheffield which reduces bandwith costs (the IronPorts are based in our London data centres).
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: Mail relay
06-01-2009 12:11 PM
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Re: Mail relay
06-01-2009 1:42 PM
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DKIM would allow PN to vouch for the authenticity of the sending domain specified by the sender. If this were just a domain whose DNS zone files were hosted by PN (the simplest implementation), I and others may have a few problems. If it applies also to domains whose DNS is hosted elsewhere, DKIM - in principle - allows for different implementations.
In the ‘proxy’ implementation, PN could require some form of authorisation that the sending PN customer is entitled to use the email domain (similar to what BT Yahoo does for its business clients; for example, a check that the domain name registrant is the same as that shown in the PN account details). PN would then, I guess, quote domain ‘plus.net’ and sign the DKIM envelope with it own key.
In an ‘originator’ implementation, the domain name owner would need to get DKIM’s TXT records added to the DNS zone file for the domain in question (and DKIM then start to look a bit like SPF).
Finally, SPF itself has been bruited about in the forums as a possible future email enhancement.
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