C# 邮件地址：在邮件标题中发现无效字符
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MailAddress: An invalid character was found in the mail header
提问by Boguslaw Buczek
I am using MailAddress to create a fax email. We are using system called SatisFAXtion v 8.6. To provide a cover page for faxing I can add a template location to the mail.TO address.
我正在使用 MailAddress 创建传真电子邮件。我们正在使用名为 SatisFAXtion v 8.6 的系统。为了提供传真封面，我可以在 mail.TO 地址中添加一个模板位置。
The format looks like this:
格式如下所示：
12125551234^template=cp\[email protected]
When compiling it works fine but I need two backslashes so I added two more as escape characters.
编译时它工作正常，但我需要两个反斜杠，所以我又添加了两个作为转义字符。
When I run the program I get an exception:
当我运行程序时，出现异常：
Message: An invalid character was found in the mail header:
StackTrace: at System.Net.Mail.MailAddressParser.ParseLocalPart(String data, Int32& index, Boolean expectAngleBracket, Boolean expectMultipleAddresses)
at System.Net.Mail.MailAddressParser.ParseAddress(String data, Boolean expectMultipleAddresses, Int32& index)
at System.Net.Mail.MailAddressParser.ParseMultipleAddresses(String data)
at System.Net.Mail.MailAddressCollection.ParseValue(String addresses)
at System.Net.Mail.MailAddressCollection.Add(String addresses)
at System.Net.Mail.Message..ctor(String from, String to)
at System.Net.Mail.MailMessage..ctor(String from, String to)
Is there a way to insert backslashes in an email address in MailAddress object?
有没有办法在 MailAddress 对象的电子邮件地址中插入反斜杠？
采纳答案by RB.
From Wikipedia:
来自维基百科：
The restrictions for special characters are that they must only be used when contained between quotation marks, and that 3 of them (The space, backslash \ and quotation mark " (ASCII: 32, 92, 34)) must also be preceded by a backslash \ (e.g. "\ \\"").
对特殊字符的限制是它们只能在包含在引号之间时使用，并且其中的 3 个（空格、反斜杠 \ 和引号 " (ASCII: 32, 92, 34)）前面也必须有反斜杠\（例如“\ \\””）。
Therefore, I don't think your email address is valid as the backslashes are not contained between quotation marks.
因此，我认为您的电子邮件地址无效，因为引号之间不包含反斜杠。
If you could change the address to something like 12125551234^template="cp\\"[email protected]I think it would be ok.
如果您可以将地址更改为类似12125551234^template="cp\\"[email protected]我认为的内容就可以了。
回答by Wiktor Zychla
Years ago I found a workaround over a similar issue. The issue was in the DisplayName parameter in the constructor of MailAddress.
几年前，我找到了解决类似问题的解决方法。问题出在 MailAddress 构造函数中的 DisplayName 参数中。
Maybe it will help you too:
也许它也会帮助你：
http://netpl.blogspot.com/2008/09/smtpclient-exception-invalid-character.html
http://netpl.blogspot.com/2008/09/smtpclient-exception-invalid-character.html
回答by HydPhani
I received this error when if this is modified to "network" --- then error got resolved. ( My understanding is - Incase of specified pickupdirectory option, the header -encoding utf-8 (base64) was giving error )
如果将其修改为“网络”，我会收到此错误 --- 然后错误得到解决。（我的理解是 - 在指定的pickupdirectory 选项的情况下，标头-encoding utf-8 (base64) 给出了错误）
Hope it helps
希望能帮助到你
