![]() ![]() You can however send email using recipient’s DNS server. June 12th, 2016 at you can’t send email without the services of a SMTP server. Can i do it using your component but without using SMTP Server. I am writing an app where i need to send email to some clients. October 28th, 2015 at your application have enough permissions to create connection to the server (SocketPermission)? ![]() I have the same way connection of the samples and i still have problems, i know it because a have a log of the issues. I had connection problems, so i decided to use the connection without the SSL. I started tried with SSL and used the port that use my mail provider “GoDaddy”. I have this problem: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond… It’s easy to use and supports Smtp, Pop3, Imap, SSL and DKIM. If you have a server already installed and running please refer to its manual on how to enable needed protocols, ssl and which ports server is using.įor a windows development box I can recommend hMailServer. We bought your software and try to setup local development box to test smtp or pop3 email.įebruary 15th, 2015 at don’t have such document, as you may be using hundred different smtp/pop3/imap servers on Windows or Linux. Tags: C# Exchange Gmail IMAP POP3 SMTP SSL TLS VB.NET Questions?Ĭonsider using our Q&A forum for asking questions.Ĩ Responses to “A connection attempt failed”ĭo you have document on how to setup SMTP server or POP3. Please read SSL vs TLS vs STARTTLS, if you are confused about those.Īgain when in doubt please ask your email server administrator for server, port, and SSL/TLS usage. If your server uses self-signed certificates you may be getting “The remote certificate is invalid according to the validation procedure” error. Usually this triggers “The handshake failed due to an unexpected packet format” exception, when you try to connect without SSL/TLS. Some servers require explicit SSL/TLS (sometimes called TLS). Please look at following articles for details: If you need to specify different port using fluent interface use OnPort() method: If you need to specify different port just use overloaded version of Connect or ConnectSSL method:Ĭlient.ConnectSSL("", 999) Ĭlient.ConnectSSL("", 999) If your server requires explicit SSL/TLS (sometimes called TLS), you need to connect using Connect method and then use StartTLS method: If SSL encryption is required, use ConnectSSL method: Exchange or Gmail can have some protocols disabled by defaultįollowing articles can help you with that:Ĭonnecting using default ports Plain text modeĮstablishing connection using default port is simple, you just need to use Connect method: the protocol you are trying to use is enabled on the server.firewall and antivirus software are disabled or configured correctly (this includes Windows Defender). ![]() you are using ConnectSSL when you require SSL/TLS, and Connect when you don’t.you use correct port numbers, and rely on parameter-less Connect() and ConnectSSL() methods (they use default ports) whenever possible.you are using correct client class with protocol you plan to use ( Pop3 class with POP3 protocol, Imap class with IMAP, and Smtp class with SMTP protocol).your application has enough security permissions to establish connection to the server.Please ask your email server administrator for server, port, and SSL/TLS usage, if those are not standard there is no way you can guess them. Connect() and ConnectSSL() and fluent interface use those ports by default. Most email providers (like Gmail, Hotmail, Yahoo and others) use default ports. “A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond” or “No connection could be made because the target machine actively refused it.” most likely you provided incorrect server, port, and SSL usage configuration to Connect, or ConnectSSL methods. If you are getting following or similar exception:
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