Sorry to jump into this discussion late, but I've got an alternative to
suggest.
Do you have a local mail server (i.e. one that speaks SMTP on port 25) on your
network? If so, you can just socket connect to this server and send all your
messages through it. If it's properly configured (i.e. if you can send and
receive Internet mail through it), the SMTP server will forward messages to the
appropriate receiver (by doing the MX lookup and then forwarding the message to
the mail server it finds).
You are still going to need to send your message using the correct SMTP
protocol commands. This is not difficult to do -- check out the Internet RFCs
for mail (821 and 822 are the most important ones) to understand what is
required. This is the complexity that JavaMail hides for you, because you have
a nice object oriented interface to a mail transport service that does it all
for you.
Craig McClanahan
Rolando Salangsang wrote:
> Before I jump into the Java Mail APIs and just for curiosity sake, I too
> would like to know if anyone knows how to do an MX lookup.
>
> Thanks again for the responses,
> Rolando
>
> > ----------
> > From: Nic Ferrier[SMTP:[EMAIL PROTECTED]]
> > Reply To: A mailing list for discussion about Sun Microsystem's Java
> > Servlet API Technology.
> > Sent: Wednesday, March 10, 1999 1:01 PM
> > To: [EMAIL PROTECTED]
> > Subject: Re: e-mail
> >
> > I'm not a mail expert but don't you have to look up the MX host rather
> > than just presuming that the domain name is the mail host?
> >
> > If you're not getting the recipient address from an email I think
> > this is what you'll have to do.
> >
> > Anyone know of an easy way to do an MX lookup?
> >
> >
> >
> > Nic Ferrier
> > Tapsell-Ferrier Ltd
> > www.tapsellferrier.co.uk
> >
> >
> > >>> Rolando Salangsang <[EMAIL PROTECTED]> 3/10/99 8:33:19 PM >>>
> > Hello,
> >
> > I have an servlet that emails a confirmation message to a user after
> > a they
> > fill out a form. All seems to be working OK except for some
> > "UnknownHost"
> > Exceptions on some email addresses.
> >
> > I use the following sample code to obtain the host of the recipient:
> >
> > int indexOfAtSign = recipientAddress.indexOf('@');
> > String host = recipientAddress.substring(indexOfAtSign + 1);
> >
> > I make a socket connection to the target as follows:
> > Socket s = new Socket(host, SMTP_PORT);
> >
> > My questions are in regards to the recipient's email address:
> > 1. If I try to test mail someone at <username>@notes.seagate.com, I
> > will get
> > an unknown host exception.
> > 2. Am I missing something that a commercial email client does to the
> > recipient's address? I can send this same message to the same address
> > as
> > question 1. without a problem.
> >
> > Any tips/ideas would be appreciated
> >
> > Thanks
> > Rolando
> >
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