BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  newbie : Best way to send Email?          BorlandTalk.com Forum Index -> Delphi Internet Winsock View previous topic :: View next topic   Author Message Robby Collins Guest Posted: Thu Apr 29, 2004 10:27 pm    Post subject: newbie : Best way to send Email? Hello, i am using D6 and Indy9 to write an email application that sends a 65kb PDF document to about 500 email addresses. i am adding all 500 email addresses in a loop with the following: BccList.Add.Text := "PersonsName"<EmailAddress> i am able to send the email, but it took about an hour to send and only about 190 emails made it to their destination. Is there a limit on the number of addresses in a BCCList? Why did it take an hour to send? What did i do wrong? How do i speed this up and improve the results? Any help is appreciated, Robby Back to top Remy Lebeau (TeamB) Guest Posted: Fri Apr 30, 2004 12:11 am    Post subject: Re: newbie : Best way to send Email? "Robby Collins" <robby (AT) jimbishopcabinets (DOT) com> wrote Quote: i am adding all 500 email addresses in a loop with the following: BccList.Add.Text := "PersonsName" Most email providers don't allow that many recipients in a single message. You should limit your recipient list to about 20-100 per message, depending on the limitations of the particular service provider that your are using to send the message with. With that many recipients, you should serious consider setting up a mailing list instead. That way, you need to send your message to only a single address, and then let the mailing list provider will handle sending the message to each individual recipient on your behalf. Quote: Is there a limit on the number of addresses in a BCCList? That depends on the service provider. Quote: Why did it take an hour to send? For 500 recipients, that averages about 5-7 seconds per recipient. When you use the To, Bcc, or Cc feature, every individual address listed has to be verified by the server before the actual message content is even touched, let alone transmitted to the server. Indy is checking the server's response on each of those validations. Quote: What did i do wrong? How do i speed this up and improve the results? Use a mailing list instead. If you are sending your mail from a client on a company network through an in-house email service, chances are the server already has built-in support for mailing lists. Otherwise, there are plenty of third-party companies that provide that kind of service, either for free (such as Yahoo Groups) or at least a small fee. Gambit Back to top Robby Collins Guest Posted: Fri Apr 30, 2004 2:35 pm    Post subject: Re: newbie : Best way to send Email? "Remy Lebeau (TeamB)" <gambit47.no.spam (AT) no (DOT) spam.yahoo.com> wrote Quote: How do i speed this up and improve the results? Use a mailing list instead. If you are sending your mail from a client on a company network through an in-house email service, chances are the server already has built-in support for mailing lists. Otherwise, there are plenty of third-party companies that provide that kind of service, either for free (such as Yahoo Groups) or at least a small fee. This list changes weekly based on membership. Is there a way to programmatically create a mailing list? <OR> Is that out of the scope of this group? Thanks, Robby Back to top Rene Tschaggelar Guest Posted: Fri Apr 30, 2004 3:53 pm    Post subject: Re: newbie : Best way to send Email? Quote: This list changes weekly based on membership. Is there a way >>to programmatically create a mailing list? <OR> Is that out of the scope of this group? There are mailing lists, ahem servers, and they send the messages directly as they probably contain an SMTP. So for a mailing list server itself, I guess you need the SMTP component. Don't bother about TO's and BCC's. Rene -- Ing.Buro R.Tschaggelar http://www.ibrtses.com Your newsgroups @ http://www.talkto.net Back to top Robby Collins Guest Posted: Fri Apr 30, 2004 7:39 pm    Post subject: Re: newbie : Best way to send Email? Rene, i didn't understand your answer to my question. Are you saying that there is a way to build an email list with Indy9? Thanks, Robby "Rene Tschaggelar" <ee123123wqe12 (AT) sd242323 (DOT) com> wrote Quote: This list changes weekly based on membership. Is there a way >>to programmatically create a mailing list? <OR> Is that out of the scope of this group? There are mailing lists, ahem servers, and they send the messages directly as they probably contain an SMTP. So for a mailing list server itself, I guess you need the SMTP component. Don't bother about TO's and BCC's. Rene -- Ing.Buro R.Tschaggelar http://www.ibrtses.com Your newsgroups @ http://www.talkto.net Back to top Rene Tschaggelar Guest Posted: Sat May 01, 2004 11:23 am    Post subject: Re: newbie : Best way to send Email? Robby, you intend to send a bunch of emails. When you want to automate this, you can write a mailclient, meaning a slim version of thunderbird, outlook or the like, which in turn send their messages to an SMTP. This SMTP may be at your provider, or it may be at your place. I for example have an own SMTP that allows me to send mail from a user named "ee123123wqe12 (AT) sd242323 (DOT) com" (amongst others) which is absolutely great. Or you can write your own SMTP with the SMTP component from Indy. The purpose of the SMTP is to tear an email address apart and find the IP where the packet has to be sent to. This means is makes a lot of DNS access to figure that out. And yes, the SMTP sends the email 500 times. If you just write a mailclient the SMTP does the sending for you and you have to be bothered with lists and the like. It all depends whether you have the bandwidth. If you have the bandwidth, eg with cable or ADSL, an own SMTP, eg on a linux box is recommended. Plus there is free mailing list software, such as mailman and majordomo that just need configuration (for Linux). If you don't have the bandwidth, eg with a dial up connection, you have to use lists of BCC in the mailheader, after figuring out how long they may be to be accepted by the SMTP of your provider. They still can have a counter and decide that you don't have to send more than NN messages per day, which means you 'd have to split them over the days. Rene Robby Collins wrote: Quote: Rene, i didn't understand your answer to my question. Are you saying that there is a way to build an email list with Indy9? Thanks, Robby "Rene Tschaggelar" <ee123123wqe12 (AT) sd242323 (DOT) com> wrote in message news:xn0dhn89s000000z (AT) ibrt_7 (DOT) .. This list changes weekly based on membership. Is there a way >>to programmatically create a mailing list? <OR> Is that out of the scope of this group? There are mailing lists, ahem servers, and they send the messages directly as they probably contain an SMTP. So for a mailing list server itself, I guess you need the SMTP component. Don't bother about TO's and BCC's. Back to top Remy Lebeau (TeamB) Guest Posted: Sat May 01, 2004 8:37 pm    Post subject: Re: newbie : Best way to send Email? "Robby Collins" <robby (AT) jimbishopcabinets (DOT) com> wrote Quote: i didn't understand your answer to my question. Are you saying that there is a way to build an email list with Indy9? Mailing lists are a server-side feature. They have nothing to do with Indy specifically. As far as Indy is concerned, a mailing list is nothing more than a single email address. When an email is sent to that address, the service provider hosting the mailing list handles resolving the individual addresses belonging to the mailing list and then sending the message to each of them individually. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Sat May 01, 2004 8:40 pm    Post subject: Re: newbie : Best way to send Email? "Rene Tschaggelar" <ee123123wqe12 (AT) sd242323 (DOT) com> wrote Quote: you intend to send a bunch of emails. When you want to automate this, you can write a mailclient, meaning a slim version of thunderbird, outlook or the like, which in turn send their messages to an SMTP. That is what he is already doing, if you go re-read the original message. The problem is that he is trying to put too many repicients into the To/Cc/Bcc fields. Hense my suggestion for establishing a mailing list somewhere, so that his own code is only sending his generated message to only a single email address rather than 500 addresses. Gambit Back to top Rene Tschaggelar Guest Posted: Sun May 02, 2004 8:03 pm    Post subject: Re: newbie : Best way to send Email? Remy Lebeau (TeamB) wrote: Quote: "Rene Tschaggelar" <ee123123wqe12 (AT) sd242323 (DOT) com> wrote in message news:xn0dhr8xo0000011 (AT) ibrt_7 (DOT) .. you intend to send a bunch of emails. When you want to automate this, you can write a mailclient, meaning a slim version of thunderbird, outlook or the like, which in turn send their messages to an SMTP. That is what he is already doing, if you go re-read the original message. The problem is that he is trying to put too many repicients into the To/Cc/Bcc fields. Hense my suggestion for establishing a mailing list somewhere, so that his own code is only sending his generated message to only a single email address rather than 500 addresses. Yes, and my vote to lean back and think it over again from a broader perspective. 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