.NET 4.0失败时带有附件超过3MB大发送电子邮件 [英] .NET 4.0 Fails When sending emails with attachments larger than 3MB

问题描述

从3.5升级我的.NET Framework 4.0后，我最近有一个问题：

I recently had an issue after upgrading my .net framework to 4.0 from 3.5:

System.Net.Mail.SmtpException：失败发送邮件。 ---> System.IndexOutOfRangeException：索引是该数组的范围之外。在System.Net.Base64Stream.En codeBytes（字节[]缓冲区的Int32偏移的Int32算，布尔dontDeferFinalBytes，布尔shouldAppendSpaceToCRLF）在System.Net.Base64Stream.Write（字节[]缓冲区的Int32偏移的Int32计数）在System.Net.Mime.MimePart.Send（BaseWriter作家）在System.Net.Mime.MimeMultiPart.Send（BaseWriter作家）在System.Net.Mail.Message.Send（BaseWriter作家，布尔sendEnvelope）在System.Net。 Mail.SmtpClient.Send（MailMessage消息）---内部异常堆栈跟踪的结尾---

System.Net.Mail.SmtpException: Failure sending mail. ---> System.IndexOutOfRangeException: Index was outside the bounds of the array. at System.Net.Base64Stream.EncodeBytes(Byte[] buffer, Int32 offset, Int32 count, Boolean dontDeferFinalBytes, Boolean shouldAppendSpaceToCRLF) at System.Net.Base64Stream.Write(Byte[] buffer, Int32 offset, Int32 count) at System.Net.Mime.MimePart.Send(BaseWriter writer) at System.Net.Mime.MimeMultiPart.Send(BaseWriter writer) at System.Net.Mail.Message.Send(BaseWriter writer, Boolean sendEnvelope) at System.Net.Mail.SmtpClient.Send(MailMessage message) --- End of inner exception stack trace ---

我看了这个连接错误列表在这里：<一href="http://connect.microsoft.com/VisualStudio/feedback/details/544562/cannot-send-e-mails-with-large-attachments-system-net-mail-smtpclient-system-net-mail-mailmessage">http://connect.microsoft.com/VisualStudio/feedback/details/544562/cannot-send-e-mails-with-large-attachments-system-net-mail-smtpclient-system-net-mail-mailmessage.

I read this connect bug listing here: http://connect.microsoft.com/VisualStudio/feedback/details/544562/cannot-send-e-mails-with-large-attachments-system-net-mail-smtpclient-system-net-mail-mailmessage.

如果任何人都关心这个问题，请投票支持它连接，所以这将是迟早固定的。

If anyone cares about this issue, please vote for it on Connect, so it will be fixed sooner.

推荐答案

该缺陷已修补：<一href="https://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=30226">https://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=30226

标题：KB2183292

Title: KB2183292

发布日期：2010年7月21日

Release Date: 7/21/2010

尺寸：8.58 MB

版本：修复

类别：构建

说明 QFE：System.Net.Mail - SmtpClient类抛出，如果文件附件是例外>超过3MB

Description QFE: System.Net.Mail - SmtpClient class throws exceptions if file attachment is > over 3MB

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