Shulou(Shulou.com)06/03 Report--

SFB project experience-66-Exchagne 2016 sent 163e-mail unsuccessfully sent QQ successfully

Problem description:

Email QQ successfully using Outlook 2016.

Using Outlook 2016 to send email to 163was not successful.

Solution:

Through understanding and analysis, it is found that SPF records may not be made, resulting in successful sending to QQ and unsuccessful transmission to 163s.

The following record is the process of troubleshooting, please refer to.

Mail refuses to send your email to the following email address:

A01@163.com (A01@163.com)

Your email cannot be delivered because the remote mail system has not issued a valid enhanced status code to confirm the exact cause, status: "550 MI:SPF 163 mx20,RsCowABnNP7GWn5bMaraBQ--.8623S3 1535007433 http://mail.163.com/help/help_spam_16.htm?ip=180.167.153.156&hostid=mx20&time=1535007433".

Mail provides this error:

MI:SPF 163mx20,RsCowABnNP7GWn5bMaraBQ--.8623S3 1535007433 http://mail.163.com/help/help_spam_16.htm?ip=180.167.153.156&hostid=mx20&time=1535007433

Diagnostic information for use by administrators:

Build server: EXC03.contoso.com

A01@163.com

Mail

Remote Server returned '550 MI:SPF 163 mx20,RsCowABnNP7GWn5bMaraBQ--.8623S3 1535007433 http://mail.163.com/help/help_spam_16.htm?ip=180.167.153.156&hostid=mx20&time=1535007433'

Original header:

Received: from EXC02.contoso.com (172.16.112.12) by

EXC03.contoso.com (172.16.112.13) with Microsoft SMTP Server

(version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id

15.1.1531.3; Thu, 23 Aug 2018 14:57:08 + 0800

Received: from EXC02.contoso.com ([fe80::19de:a537:2e32:7ea0]) by

EXC02.contoso.com ([fe80::19de:a537:2e32:7ea0]) with mapi id

15.01.1531.003; Thu, 23 Aug 2018 14:57:08 + 0800

From: SFBDemo01

To: "A01@163.com"

Subject: A-To-163

Thread-Topic: A-To-163

Thread-Index: AdQ6rmzcdE1XCwQGQKulPz53GPpLKw==

Date: Thu, 23 Aug 2018 06:57:05 + 0000

Message-ID:

Accept-Language: zh-CN, en-US

Content-Language: zh-CN

X-MS-Has-Attach:

X-MS-TNEF-Correlator:

X-originating-ip: [172.16.112.17]

Content-Type: multipart/alternative

Boundary= "_ 000roomc1e3de54cfb549fbbc5c40ce3088d87acontosocom _"

MIME-Version: 1.0

Nslookup

Ex01.contoso.com

Ex02.contoso.com

Ex03.contoso.com

Check to see if your public network IP, if so, need to = = 163.com whether it is your public network IP, and then send an email.

C:\ > nslookup-qt=txt 163.com

Server: UnKnown

Address: 192.168.1.1

Non-authoritative response:

163.com text =

"v=spf1 include:spf.163.com-all"

C:\ > nslookup-qt=txt ctrip.com

Server: UnKnown

Address: 192.168.1.1

Non-authoritative response:

Ctrip.com text =

"v=spf1 include:a.spf.ctrip.com include:b.spf.ctrip.com include:c.spf.ctrip.com include:d.spf.ctrip.com-all"

Ctrip.com text =

"v=spf2.0/pra include:a.spf.ctrip.com include:b.spf.ctrip.com include:c.spf.ctrip.com include:d.spf.ctrip.com-all"

Ctrip.com text =

"MS=ms62746735"

Ctrip.com text =

"0RhgfGwGA1HoaS1HmgmNzdroomtKZb46AxM4nqm73bTsj9! 3MIn0pmyIbZasbdvgvrXYGtnr6KroomwHvPhQ0QysxoQcards ="

C:\ >

Exchange 2013:

The function and interpretation of SPF record

The function and interpretation of SPF record

The full name of SPF is Sender Policy Framework, which means sender policy architecture.

The function of SPF record is to put forward a kind of DNS record type to prevent spam, and SPF is a kind of TXT record.

The essence of the SPF record is to announce to the recipient that the mail in this domain name is sent from the IP listed on the list as legitimate mail rather than fake spam.

Setting up SPF is a very important step in correctly setting up the domain name record and STMP sent by email.

The method of viewing SPF record

After entering DOS mode in Windows, use the following command

Nslookup-type=txt domain name

Under the Unix operating system:

# dig-t txt domain name

A brief description of SPF

V=spf1 represents the version of spf1

IP4 validates on behalf of IPv4 (IP6 stands for IPv6). Note that there is no space between "ip4:" and "IP".

~ all represents the end (Note: publishing SPF records that use-all instead of ~ all may cause delivery problems)

Illustration of SPF record

Take a look at the following example SPF record:

Yourdomain.com "v=spf1 a mx mx:mail.i-x-Cloud.com ip4:202.96.88.88 ~ all"

This SPF record specifies that the IP address that allows @ yourdomain.com to be sent is:

A this a refers to the IP address parsed by yourdomain.com. If it is not configured, it should be cancelled.

The mx corresponding to mx yourdomain.com, that is, the ip corresponding to the A record of mail.yourdomain.com.

Mx:mail.i-x-Cloud.com should also cancel the MX record if mail.i-x-Cloud.com is not configured.

Ip4:202.96.88.88 is directly the IP address of 202.152.186.85.

Some other grammars are as follows:

-Fail, indicating that no other matches have occurred.

~ stands for soft failure and is usually used in testing.

? Stands for ignoring.

The domain name range represented by include is followed by

If more than one ip is sent out, multiple must be included.

V=spf1 ip4:202.96.88.88 ip4:202.96.88.87 ~ all

Test SPF setting results

Enter at the Windows command line using the method provided earlier

Check the nslookup-type=txt domain name to see if there is a set SPF record in the result.

Considerations for using SPF to record

When using SPF records, the most important thing to note is that the SPF records are also updated after the IP address of the mail server has been changed.

Use Outlook 2016 to connect to Exchange 2016 and then send and receive email to Ctrip, normal.

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