>------- Original Message ------- > > 2) How I will be able to connect in the SMTP server if I only have the email > account and I do not have the password? What do you mean with "connect" ?
Under "normal" circumstances, you would connect to your local SMTP Server (or your ISP's) to send e-mail. In your particular case, you want to connect directly to the recipient's SMTP server. The first thing to do is to find out the server's address, and you do this by performing a DNS Query and checking the MX (Mail Exchanger) record: You take the e-mail address, split it on the '@' symbol, and take the part on the right side -- that should be the network's domain. You perform the MX record query against this domain, and it should return the host address of the SMTP server that serves that domain. Note that this is not the same as trying to connect directly to the domain name, as most of the time this may not work. (I'm sorry I can't help with that part, because I've never used TDNSQuery.) For example, suppose you have this list's address: <twsocket@elists.org>. You take the domain part, <elists.org>, and perform a DNS query for the MX record, and the query returns the actual address of the mail server that serves elists.org: <mail.elists.org>. Once you have the SMTP server's host address, you set that as the host property of the TSMTPCli component, and then perform the SMTP transaction as usual. One thing to understand is that connecting to a remote SMTP server depends on that server accepting you as a valid external server. This is important. It means that if the SMTP server requires some sort of authentication, and you are not a local user (and therefore do not have valid credentials), you won't be able to connect. That said, remote servers *should* allow external connections when the recipient is local (how else would the users ever receive mail from the outside world?). I say "should", because there may be some restrictions. For instance, the server may require you to have a valid SPF record, or may perform some look-up in anti-spam databases to make sure you are not a known open-relay host, etc. Also, most, if not all, major ISP networks block direct SMTP connections from dynamic IP addresses (this includes Dial-Up as well as Broadband connections). I hope this helps. -dZ. -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
