[Date Prev][Date
Next][Thread Prev][Thread Next][Date
Index][Thread Index]
RE: Re: Bandwidth [was Replacing Yahoo with a paid provider was
Posting etiquette]
- To: <ukha_d@xxxxxxx>
- Subject: RE: Re: Bandwidth [was Replacing Yahoo with a paid
provider was Posting etiquette]
- From: "Mark Harrison" <Mark.Harrison@xxxxxxx>
- Date: Tue, 5 Feb 2002 09:30:23 -0000
- Delivered-to: mailing list ukha_d@xxxxxxx
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
Mark Hetherington wrote:
> Rarely does a message go direct from your (or ISP) email server to a
> destination email server...
Was true a year ago. No longer true.
The vast majority of ISPs and corporates have disabled SMTP relaying for
foreign domains following the release of a Outlook virus about a year
ago that acted by resolving A records for every person in the "sent
items", opening port 25 on those servers, seeing which supported SMTP
relaying, and then spamming through it!
> since to do so would introduce unecessary lag in
> the chain. Redundancy and all that :)
Er no - SMTP relaying is SLOWER than direct delivery. Think about it -
which is faster, passing a message from A to B, or passing a meesage
>from
average, the same speed links each time, but in the second example, gets
a further delay be a message relay.
The only case where relaying is still widely used is in larger
organisations, which will separate out the users mail servers from the
SMTP relaying server. Even then, however, the SMTP relay will only
accept email to or from one of its Domains.
Regards,
Mark
Home |
Main Index |
Thread Index
|