Does SMTP need valid FROM address?

My emails are sent using SMTP, with this entered in
Agent>Options>System
smtpauth.dial.pipex.com

I've just altered my 'From' email address in Agent>Options to
(E-Mail Removed) in another attempt to reduce spam.
But I'm not sure my emails are getting through! Is there any reason
why the SMTP service wouldn't send if it sees a 'From' address that
doesn't match my genuine one?

--
Terry, West Sussex, UK

Terry Pinnell <(E-Mail Removed)> wrote:

>My emails are sent using SMTP, with this entered in
>Agent>Options>System
>smtpauth.dial.pipex.com
>
>I've just altered my 'From' email address in Agent>Options to
>(E-Mail Removed) in another attempt to reduce spam.
>But I'm not sure my emails are getting through! Is there any reason
>why the SMTP service wouldn't send if it sees a 'From' address that
>doesn't match my genuine one?

Although I've had no reply from a similar query to Pipex, I think it's
now clear that this is indeed down to my server requiring my correct
email address.

However, from help over in the Agent NG I reckon I now see how to sort
this.

--
Terry, West Sussex, UK

"Terry Pinnell" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> My emails are sent using SMTP, with this entered in
> Agent>Options>System
> smtpauth.dial.pipex.com
>
> I've just altered my 'From' email address in Agent>Options to
> (E-Mail Removed) in another attempt to reduce spam.
> But I'm not sure my emails are getting through! Is there any reason
> why the SMTP service wouldn't send if it sees a 'From' address that
> doesn't match my genuine one?

I don't see any need to spamtrap your email address when emailing. Yes, some
servers do verify the FROM address to make sure it is valid. If you are
emailing people they should be able to reply without having to change the
address. If you're posting in a public forum then yes, spamtrap your
address. My server will only accept mail from an address it can verify as
real.

I doubt very much if you are getting your address harvested from your emails
to other individuals.

"MA" <(E-Mail Removed)> wrote:

> I don't see any need to spamtrap your email address when emailing. Yes, some
> servers do verify the FROM address to make sure it is valid.

How can a server (or anyone else for that matter) verify a FROM address
to make sure it is valid?

--
Alec McKenzie
(E-Mail Removed)

"Alec McKenzie" <(E-Mail Removed)> wrote in message
news:news.x.armck-(E-Mail Removed)...
> "MA" <(E-Mail Removed)> wrote:
>
> > I don't see any need to spamtrap your email address when emailing. Yes,
some
> > servers do verify the FROM address to make sure it is valid.
>
> How can a server (or anyone else for that matter) verify a FROM address
> to make sure it is valid?

It tries to send an email to that address and makes sure it isn't rejected.

From http://www.argosoft.com/applications...changelist.asp

a.. Improved verification of RCPT TO addresses. Added "agressive"
verification, when server actually tries to connect to the sender's domain,
and verify whether user exists (Pro version);

"Alec McKenzie" <(E-Mail Removed)> wrote in message
news:news.x.armck-(E-Mail Removed)...
> "MA" <(E-Mail Removed)> wrote:
>
> > I don't see any need to spamtrap your email address when emailing. Yes,
some
> > servers do verify the FROM address to make sure it is valid.
>
> How can a server (or anyone else for that matter) verify a FROM address
> to make sure it is valid?
>
> --
> Alec McKenzie
> (E-Mail Removed)

They don't check the whole email address, just the domain. Our SMTP look up
the domain name in the senders address to make sure that it's a valid domain
name.

Chris.

"MA" <(E-Mail Removed)> wrote:

> "Alec McKenzie" <(E-Mail Removed)> wrote in message
> news:news.x.armck-(E-Mail Removed)...
> > "MA" <(E-Mail Removed)> wrote:
> >
> > > I don't see any need to spamtrap your email address when emailing. Yes,
> some
> > > servers do verify the FROM address to make sure it is valid.
> >
> > How can a server (or anyone else for that matter) verify a FROM address
> > to make sure it is valid?
>
> It tries to send an email to that address and makes sure it isn't rejected.

1. How long would it wait for rejection to "make sure" it won't be
rejected?

2. If it weren't rejected, presumably it would be delivered, so what
would the recipient make of this email?

--
Alec McKenzie
(E-Mail Removed)

"Chris" <(E-Mail Removed)> wrote:

> "Alec McKenzie" <(E-Mail Removed)> wrote in message
> news:news.x.armck-(E-Mail Removed)...
> > "MA" <(E-Mail Removed)> wrote:
> >
> > > I don't see any need to spamtrap your email address when emailing. Yes,
> some
> > > servers do verify the FROM address to make sure it is valid.
> >
> > How can a server (or anyone else for that matter) verify a FROM address
> > to make sure it is valid?
> >
> > --
> > Alec McKenzie
> > (E-Mail Removed)
>
> They don't check the whole email address, just the domain. Our SMTP look up
> the domain name in the senders address to make sure that it's a valid domain
> name.

So the address itself doesn't need to be valid? What is the point of
that?

--
Alec McKenzie
(E-Mail Removed)

"Alec McKenzie" <(E-Mail Removed)> wrote in message
news:news.x.armck-(E-Mail Removed)...
> "Chris" <(E-Mail Removed)> wrote:
>
> > "Alec McKenzie" <(E-Mail Removed)> wrote in message
> > news:news.x.armck-(E-Mail Removed)...
> > > "MA" <(E-Mail Removed)> wrote:
> > >
> > > > I don't see any need to spamtrap your email address when emailing.
Yes,
> > some
> > > > servers do verify the FROM address to make sure it is valid.
> > >
> > > How can a server (or anyone else for that matter) verify a FROM
address
> > > to make sure it is valid?
> > >
> > > --
> > > Alec McKenzie
> > > (E-Mail Removed)
> >
> > They don't check the whole email address, just the domain. Our SMTP look
up
> > the domain name in the senders address to make sure that it's a valid
domain
> > name.
>
> So the address itself doesn't need to be valid? What is the point of
> that?

Mine does. For example, a mail from (E-Mail Removed) to my server will
cause my server to make an SMTP connection to hotmail.coms mail server, and
issue the RCPT TO : (E-Mail Removed)

If it gets a 550 no such user the incoming mail to my server is rejected. If
it gets a Recipient ok message, it does a RSET and quits, the incoming
message is then permitted.

I'm using News Rover to browse & take part in Usenet Newsgroups.
News Rover is set up with a valid email address & SMTP server details which
enables messages to be sent, but then you also have the facility to create
"Identities" which appear in the message headers so you are not revealing
your real email address. Multiple identities can be created and defaults
selected for various newsgroups.