blocks|key|3553125|text|你读过杰夫·阿特伍德的-+所以你想发一些电子邮件(通过代码)吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3553126|如果你愿意付钱以避免设置域名密钥、反向ptr记录、发件人id等麻烦，请使用第三方邮件提供商(如SendGrid+)。|entityMap|0|LINK|mutability|MUTABLE|url|http://www.codinghorror.com/blog/2010/04/so-youd-like-to-send-some-email-through-code.html^0|D|H|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@$A|N|B|O|1|P]]|C|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|C|$]]]|F|$G|$5|H|I|J|C|$K|L]]]]

Did you read Jeff Atwood's - <a href="http://www.codinghorror.com/blog/2010/04/so-youd-like-to-send-some-email-through-code.html" rel="nofollow noreferrer">So You'd Like to Send Some Email (Through Code)</a> ? 

If you are willing to pay money to avoid the hassle of setting up domain keys, reverse ptr record, sender id, etc., use a third party mail provider like SendGrid.

blocks|key|3553076|text|你查过你的邮件记录了吗？我不熟悉您正在使用的邮件服务器，但必须有日志。上面有提到掉掉的邮件吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3553077|另外，您是否在服务器上设置了反向DNS？如果您没有反向指针，许多电子邮件提供程序都会丢弃您的电子邮件。这将允许其他站点将您的IP地址123.123.123.123解析到您的域中，mydomain.com。这样你就更可靠了。您可能需要联系您的ISP来设置这个。|3553078|维基百科上的反向DNS|offset|length|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Reverse_DNS_lookup^0|0|0|0|B|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@$F|R|G|S|1|T]]|A|$]]]|H|$I|$5|J|K|L|A|$M|N]]]]

Have you looked in your mail logs? I am not familiar with the mail server that you are using, but there must be a log. Does it say anything about dropped emails?

Also, have you setup Reverse DNS on your server? Many email providers will drop you email if you do not have a reverse pointer. This will allow other sites to resolve your IP-address 123.123.123.123 into your domain, mydomain.com. Thus you get more reliable. You might have to contact your ISP to setup this.

<a href="http://en.wikipedia.org/wiki/Reverse_DNS_lookup" rel="nofollow noreferrer">Reverse DNS on wikipedia</a>

blocks|key|5851710|text|如果在您的终端有任何问题，这个电子邮件服务器测试可以告诉您。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|entityMap|0|LINK|mutability|MUTABLE|url|http://www.allaboutspam.com/email-server-test^0|F|9|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@$A|L|B|M|1|N]]|C|$]]]|D|$E|$5|F|G|H|C|$I|J]]]]

If there are any issues at your end, this <a href="http://www.allaboutspam.com/email-server-test" rel="nofollow noreferrer">Email Server test</a> could tell you.

blocks|key|3553154|text|如果您搜索“IIS6+SMTP日志”，您将发现有关日志记录的信息。但是，如果您的ISP包含其他客户信息，它将不会向您发送完整的日志。我要求我的ISP从日志中选择我的信息，但他们没有给我任何东西。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3553155|你是否在网站上有类似“资本重组”的东西，以确保它是真实的人注册？如果不是，也许会有一些自动的尝试来尝试注册虚假的电子邮件地址？|3553156|考虑SPF记录。|3553157|你也可以考虑提供类似于这个网站的开放ID。|3553158|也许在某个地方有一些人群源服务可以用作测试，以便来自不同地方的人尝试注册并向您报告结果。|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|M|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|N|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|O|8|@]|9|@]|A|$]]]|J|$]]

If you search for 'IIS6 SMTP log' you will find information on logging. However your ISP will not send you a complete log if it contains other customers info. I asked my ISP to select out my info from the log but they did not send me anything.

Have you got something like 'recaptca' on the website so as to be sure that it is real people signing up? If not maybe there is some automated attempt going on to try to sign up with false email addresses?

Consider SPF records.

You might also want to consider also offering Open-ID similar to this website.

Perhaps there is some crowd source service somewhere which could be used as a test so that people from various places attempt to sign up and report back results to you.

blocks|key|5851843|text|确保您的服务器的ip没有黑名单ip，除了rDNS。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5851844|来确认我是否喜欢MXToolBox。|offset|length|entityMap|0|LINK|mutability|MUTABLE|url|http://www.mxtoolbox.com/^0|0|8|9|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]]|F|$G|$5|H|I|J|A|$K|L]]]]

Make sure that your server's ip doesn't have a blacklisted ip, apart from the rDNS.

To check that i like <a href="http://www.mxtoolbox.com/" rel="nofollow noreferrer">MXToolBox</a>.

blocks|key|3553186|text|首先要检查的是您要发送电子邮件的目标域的MX记录。它必须指向目标邮件服务器。其次，检查目标邮件服务器上的日志，它们将取代未发送到邮箱的情况。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3553187|您可以通过提供以下链接的IP地址来测试邮件服务器：-+http://mxtoolbox.com/diagnostic.aspx|offset|length|3553188|它将检查邮件服务器的Open。它将检查邮件服务器的反向DNS。|3553189|此外，你也可以对照黑名单在同一网站。|3553190|如果一切顺利，请检查目标服务器上的邮件日志。|entityMap|0|LINK|mutability|MUTABLE|url|http://mxtoolbox.com/diagnostic.aspx^0|0|R|10|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@$D|U|E|V|1|W]]|A|$]]|$1|F|3|G|5|6|7|X|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|Z|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

The first thing to check is the MX record for the destination domain where you are sending the emails. It must point to the destination mail server.
Secondly, check the logs at the destination mail server, they will displace the case why they are not sent to the mailbox.

You may test your mail server by providing the IP Address at the link below:-
<a href="http://mxtoolbox.com/diagnostic.aspx" rel="nofollow noreferrer">http://mxtoolbox.com/diagnostic.aspx</a>

It will check the mail server for Open Relay.
It will check the mail server for Reverse DNS.

Also, you may check against the Blacklist at the same site.

In case case it all succeeds, check the mail logs at the destination server.

I have been struggling for this issue for months. I have a website, that the registration requires email authentication. I did a check (daily), the statistics are quite interesting. Everyday, out of 300++ users sign up, only 50 - 60 % are activated. There is one time, when my website traffic suddenly burst up, I have around 1000++ users signup per day, and it last about 1 week. However, the statistics still show that only 50 - 60% users are activated. I dont think its a coincidence, since the statistics always shows 50 - 60% users are activated. (I check my database everyday)

I guess, maybe my emails were treated as spams, and thus not able to reach the recipients. But I wonder, how many emails does FaceBook send per day? For me, I received about 20 - 30 emails from them everyday. We all know that, facebook has millions of users, I cant imagine how many emails were sent per day. Those mails are not considered spams? 

Is my hosting company responsible for this? or its my script/programming problems?

Here is my server information:
OS: Windows
Web Server: IIS 6
Web Languages: HTML, PHP, JS + Jquery
Mail Server: MailEnable Standard
SQL: MySQL 5.XX

Email sent, but recipients do not receive it?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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几个月来，我一直在为这个问题而奋斗。我有一个网站，注册需要电子邮件认证。我(每天)做了一次检查，统计数据很有趣。每天，从300++用户注册，只有50-60%的激活。有一次，当我的网站流量突然崩溃，我周围的1000++用户每天注册，它持续大约一周。然而，统计数据仍然显示，只有50-60%的用户被激活。我认为这不是巧合，因为统计数据总是显示50-60%的用户被激活。(我每天检查我的数据库)我想，也许我

问发邮件了，但收件人没有收到吗？
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