blocks|key|150436|text|我不能复制这个。上面的代码适用于我。也许可以尝试每次都使用单独的'+to‘来添加它们。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|150437|mailMessage.To.Add(x);
mailMessage.To.Add(y);|code-block|syntax|javascript|150438|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I can't replicate this. The above code works for me. Maybe try to add them using a seperate 'To' each time.

<pre><code>mailMessage.To.Add(x);
mailMessage.To.Add(y);
</code></pre>

blocks|key|150488|text|找到罪魁祸首了：这是最后一个电子邮件地址末尾的额外逗号(，)+|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|150489|mailMessage.To.Add("amir_khan@enter.com,walter_white@yahoo.com,");|code-block|syntax|javascript|150490|刚刚去掉了它，瞧！它起作用了。不知道为什么它在控制台应用程序中工作，而不是在sharepoint中工作:(|150491|mailMessage.To.Add("amir_khan@enter.com,walter_white@yahoo.com");|150492|如果这在SharePoint中不起作用，请将每个地址分别添加到MailMessage对象中，如下所示；|150493|foreach+(var+address+in+StringofEmails.Split(","))+{
MailMessage.To.Add(new+MailAddress(address.Trim(),+""));|150494|}|150495|entityMap^0|8|K|T|2|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|14|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|16|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|V|$]]

Got the culprit: It's the extra comma(,) at the end of last email address

<pre><code>mailMessage.To.Add("amir_khan@enter.com,walter_white@yahoo.com,");
</code></pre>

Just removed that and voila! its working. Don't know why it's working in console application but not in sharepoint :( 

<pre><code>mailMessage.To.Add("amir_khan@enter.com,walter_white@yahoo.com");
</code></pre>

If this does not work in SharePoint then please add each address separately onto MailMessage object like below;

<pre><code>foreach (var address in StringofEmails.Split(",")) {
MailMessage.To.Add(new MailAddress(address.Trim(), ""));
</code></pre>

}

blocks|key|150507|text|我不得不用更好看的电子邮件更新一个项目，然后我发布了这个web项目，并得到了这个错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|150508|我的是来自一些调试代码，其中|150509|currentUser+=+myname@mycompany.com+++|code-block|syntax|javascript|150510|添加了|150511|MailAddress+mailAddressUser+=+new+MailAddress(currentUser+%2B+"@mycompany.com");|150512|本质上：|150513|myname@mycompany.com@mycompany.com++++|150514|因此，不是一个带有尾随逗号的问题，而是另一个@|150515|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

I had to update a project with nicer looking emails and I published the web project and got this error.

Mine was from some debug code in which 

<pre><code>currentUser = myname@mycompany.com 
</code></pre>

got added 

<pre><code>MailAddress mailAddressUser = new MailAddress(currentUser + "@mycompany.com");
</code></pre>

Essentially:

<pre><code>myname@mycompany.com@mycompany.com 
</code></pre>

So instead of an issue with a trailing comma, literally another @

blocks|key|149226|text|在我的例子中，我忘记过滤掉没有电子邮件的用户，所以我像这样形成了我的电子邮件列表：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|149227|username1@ldomain.com
username2@domain.com
@domain.com++//PROBLEM+HERE
username3@linamar.com|code-block|syntax|javascript|149228|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In my case I forgot to filter out users without email, so I was forming my list of emails like this:

<pre><code>username1@ldomain.com
username2@domain.com
@domain.com //PROBLEM HERE
username3@linamar.com
</code></pre>

blocks|key|2940466|text|即使末尾没有逗号，我也得到了错误。原来我需要在逗号后面留一个空格|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2940467|我必须将代码从string.Join("，"，emailList)更改为string.Join("，"，emailList)|2940468|下面的内容对我来说不起作用。|2940469|mailMessage.To.Add("amir_khan@enter.com,walter_white@yahoo.com");|code-block|syntax|javascript|2940470|下面的代码对我很有效(注意逗号后面有空格)。|2940471|mailMessage.To.Add("amir_khan@enter.com,+walter_white@yahoo.com");|2940472|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|S|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|T|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|V|8|@]|9|@]|A|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

I got the error even though I don't have a comma at the end. It turns out that I need to leave a space after the comma 

I have to change my code from a string.Join(",", emailList) to string.Join(", ", emailList)

Following didn't work for me.

<pre><code>mailMessage.To.Add("amir_khan@enter.com,walter_white@yahoo.com");
</code></pre>

Following worked for me(Observe that there is space after the comma).

<pre><code>mailMessage.To.Add("amir_khan@enter.com, walter_white@yahoo.com");
</code></pre>

I am getting this error when I am using it in sharepoint project, while in console app its working fine

I am using <code>MailMessage</code> class to send email using SMTP .
But when I trying to add user to 'To' property I am getting {"An invalid character was found in the mail header: ','."} exception, which I think something fishy is happening here as ',' is allowed to separate multiple users . <a href="http://msdn.microsoft.com/en-us/library/ms144695.aspx" rel="noreferrer">Adding multiple user</a>

** Multiple e-mail addresses must be separated with a comma character (",").** 

<pre><code>MailMessage mailMessage = new MailMessage();

 mailMessage.To.Add("amir_khan@enter.com,walter_white@yahoo.com,");
</code></pre>

MailMessage.To.Add() throwing exception : "An invalid character was found in the mail header: ','."

当我在sharepoint项目中使用它时，我收到了这个错误，而在控制台应用程序中，它工作正常的我正在使用MailMessage类发送电子邮件。但是当我尝试将用户添加到' to‘属性时，我得到了{“在邮件头中发现无效字符：'，'."}异常，我认为这里发生了一些可疑的事情，因为'，’被允许分隔多个用户。**多个电子邮件地址...

问MailMessage.To.Add()抛出异常：“在邮件头中发现无效字符：'，‘。”
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问MailMessage.To.Add()抛出异常：“在邮件头中发现无效字符：'，‘。”
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