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C# Failure sending mail.

时间: 2023-11-26 08:25:35 浏览: 153

C# 服务器发送邮件失败实例分析

错误展示：我在本地是可以发送的但部署到服务器上后就不能发送了。SMTP服务是开了的。报错： “{“success”:false,”message”:”错误System.Net.Mail.SmtpException: Failure sending mail. —> System.Net.WebException: The remote name could not be resolved: ‘smtp.163.com’ 分析：邮件发送相关端口首先说下邮件发送的端口：25/465/587 25端口 25端口是为SMTP协议服务开放的，是这三个端口中最老的一个。25端口也称为消息中继端

If you are experiencing a failure while sending emails in C#, there are a few things you can check: 1. Make sure you have the correct SMTP server settings. Verify the hostname, port number, username, and password. 2. Check if your firewall is blocking the SMTP traffic. If so, you need to allow the SMTP port (usually 25 or 587) to pass through the firewall. 3. Double-check that the email address you are sending to is correct and valid. 4. Check if your email provider has any restrictions on sending emails from your account. Some providers require you to enable "less secure apps" in your account settings. 5. Make sure that your email message is correctly formatted with all the necessary headers and content. If none of these steps solve the problem, you may need to check the error message to determine what exactly is causing the failure.

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