The MX record is a type of resource record in the Domain Name System that specifies a mail server responsible for accepting email messages on behalf of a recipient's domain.

learn more… | top users | synonyms (1)

13
votes
8answers
14k views

DNS: Subdomains that Require Both an MX Record and a CNAME

Let us say we own the zone mywebservice.com. I would like each of my customers to get their own subdomain, such as customer.mywebservice.com. customer.mywebservice.com needs to be a CNAME to a ...
4
votes
1answer
70 views

New public IP address - Email, web server

I support a small office of about 100 users. We run a small virtual environment and host our own on-premises Exchange server and Web Server. We are in the process of upgrading our internet connection ...
0
votes
1answer
56 views

How am I supposed to set up email through an external email service when I'm not allowed to use MX records? [closed]

Trying to use Amazon SES (Simple Email Service) but it requires me to add an MX record to my registrar. According to many sources, including this one, I'm not allowed to have a CNAME record together ...
1
vote
1answer
114 views

How to include multiple spf domains with different mechanisms in a single spf TXT Record [duplicate]

EDIT : How to Mix the different mechanisms (a , mx , ip4 , ptr and include) to create single SPF file from 4 I know that 2 simple SPF records like v=spf1 include:_spf.google.com ~all v=spf1 ...
21
votes
4answers
16k views

DNS using CNAMEs breaks MX records?

We are trying to move all our websites we host to CNAMES as we are planning on moving servers in the new year and would like the ability to move some clients to one server and other clients somewhere ...
-1
votes
2answers
34 views

Multiple MX record priority

My domain MX records points to my webserver Ip address, while GoDaddy tutorial suggest to use an MX record that points to my smtp server ip address. I think that one server point to the other one. ...
-2
votes
1answer
32 views

Recover Live.com Custom Domain MX Records [closed]

Ok, so like a completely unprepared person, I let my hosting lapse. My hosting was with my registrar. I figured "OK, no big deal, I'll just keep it off until I get paid". Well, about a week later (as ...
1
vote
1answer
3k views

Missing or Invalid DMARC Record in server mail

my main problem is that I am not receiving mails to my domain after adding an MX Server to my domain for mailing in Webmin, and After testing a server by mxtoolbox.com tool, I found that there is ...
0
votes
4answers
108 views

Reverse MX Record Search

Say I check the MX records for the domain example.com and find that it's MX record points to mail.example.com. I know how to go from domain name to MX record. I'd like to go the other way around. I ...
1
vote
0answers
9 views

Setup email for specific domain using EC2 and Route53 [closed]

I've set up postfix running on an EC2 instance with myhostname and mydomain changed appropriately. I've also made sure that my A and MX record are pointing to the EC2 instance. However, when I send ...
1
vote
1answer
67 views

How to set up mx records

So I bought a new domain name from GoDaddy and pointed the domain to my VPS IP Address which works fine. [Please note, the VPS is not hosted with GoDaddy, just the domain name.] However, I noticed ...
1
vote
0answers
39 views

Office 365 MX record for subdomain

I have a domain registered with an external registrar (marcaria.com). It is configured to be handled by Office365. (DNS name servers set to ns1 (and ns2) .bdm.microsoftonline.com). I have a contracted ...
5
votes
2answers
2k views

Benefits of using a subdomain for sending email?

Assume I own the domain name, example.org. I am creating a setup where I receive email sent to me@example.org using Google Apps. The MX records for example.org already point to Google's servers and it ...
0
votes
0answers
73 views

Best Practice for Split Domain Routing - Exchange Server

We have a hosted Exchange environment and would like to get a mirrored copy of all of our accounts in real time. Would Split Domain Routing allow us to route emails from the same accounts to 2 ...
0
votes
1answer
794 views

MX record set up using Zoho mail and Linode DNS manager

I've decided to try Zoho's email service given that it's free up to 10 users. I'm having difficulty getting my mx records to jibe correctly with Zoho. Unfortunately Zoho's documentation is over ...
0
votes
1answer
39 views

setup posfix mail server - allow local emails (error 550 5.7.1)

I have from on website and submiting it should sens question email to support on behalf of customer (puting his email addres as sender) Problem is that support does not recieve email but insead ...
0
votes
1answer
27 views

Using a subdomain to send email through Google Apps without migrating email from primary domain

Is it possible to set up email through Google Apps such that a single box, such as info@mailer.mydomain.com, can be used for bulk email without having to migrate all company email across to Google ...
-2
votes
2answers
53 views

MX Record Host Name Change

I'm trying to set up my own email server, but am unsure what to change the MX record 'target' to. (I'm unclear if this is the correct terminology, hence the inverted commas.) I should say that I'm ...
8
votes
4answers
298 views

MX records, better setup for load balancing and failover

Take domain example.com, it has two mail servers mail1.example.com and mail2.example.com, both already configured, usually I would go with the following setup: example.com. 1200 IN ...
-2
votes
1answer
45 views

Creating DNS CNAME or MX aliases

How can I create a CNAME or an MX record alias, for example, I need smtp.mydomain.com to resolve to smtp.yandex.com so that on my email client I should enter smtp.mydomain.com instead of smtp.yandex....
-1
votes
2answers
56 views

Will e-mail addresses for different domains arrive at the same mailbox if MX records are identical? [closed]

Say I have bluppfisk@bluppfisk.com, but I want bluppfisk@bluppfisk.co.uk to be treated as an alias without setting up a forward. Can I just configure the MX record for bluppfisk.co.uk to point to ...
16
votes
2answers
1k views

Server 2012R2 DNS server returning SERVFAIL for some AAAA queries

(Rewriting most of this question since a lot of my original tests are irrelevant in light of new information) I'm having issues with Server 2012R2 DNS servers. The biggest side effect of these ...
-3
votes
1answer
56 views

What is the minimum requirements to receive mail for a specific domain?

I think it is: A MTA - Mail transfer Agent software on the server A MX record, a DNS record specifying which server receives mail for this domain. This would deliver mail to a file on the server ...
2
votes
2answers
2k views

Setting MX records with Registrar vs. Nameserver Host

I'm a bit confused about what has happened with one of my client's email accounts. My client registered a domain at dotster.com. She wanted to start using email for that domain before we had her ...
-1
votes
2answers
66 views

MX Records and A Records Updated But Email Addresses Can Still Send Email [closed]

I have updated the MX Records, the A records, the Z records and the cname for a particular domain but the emails registered with the hosting provider can still send email. The changes have definitely ...
13
votes
10answers
4k views

Using fake MX records to combat spam

I have a client that is getting heavily spammed.. It's the 15th of the month and POP3 bandwidth is almost 100 GB. There are only 7 e-mail accounts on this domain. I installed SpamAssassin set it to 5 ...
1
vote
2answers
2k views

Why does MXToolBox not return MX records for my domains hosted with Amazon Route 53?

Ok, this should be straight forward and I'm ashamed I haven't been able to figure this one out for myself, but... I've recently discovered Amazon Route 53 DNS services and I'm now using this for the ...
-1
votes
1answer
41 views

MX Record for a physical server

I've a physical server which is used as a Mail Transfer Agent(MTA), I'm using postfix as SMTP server and cyrus as IMAP. I've a static IP for the server and have SSH access to it. Postfix and cyrus ...
0
votes
1answer
57 views

Is it possible to see changed in email headers because of MX record changes? [closed]

I have a need to know when an MX record changed. I know from previous messages that there isn't much online that can help me determine the exact timing of the change, but is there a way in my ...
0
votes
1answer
210 views

No PTR record according to gmail

Recently, I installed iredmail on my VPS and configured DNS records (including ptr). It confirms nslookup: nslookup zelenin.top Name: zelenin.top Address: 191.101.251.182 nslookup -query=mx ...
0
votes
1answer
49 views

How to Properly Set SPF Record [duplicate]

I am new to setting up server, this is my first time setting up mail server on my own. I am using ubuntu with webmin, everytime I send and receive from gmail, I had no problem. I can receive emails ...
0
votes
1answer
112 views

Mail servers complain that there's no valid MX record but there is

We have a domain that uses gmail for its mail exchange but some mail servers are bouncing our emails with the following message: The error that the other server returned was: 550 The email sent ...
4
votes
2answers
191 views

Big Trouble with (I think) Outlook X500 addressing

I moved a small client from one hosted Exchange server (Microsoft Office 365) to another (Intermedia.net). Some emails from External senders to the users on the new server host are undeliverable, ...
-3
votes
2answers
39 views

What is the best way to setup email hosting on different server [closed]

we want to use server "xyz" for emails and meanwhile keep the site on server "abc" we have entered both name server records into godaddy. ns1.abc.com ns2.abc.com ns1.xyz.com ns2.xyz.com In server "...
1
vote
1answer
48 views

DNS mail record concatenates IP address and hostname together

I have the following BIND zone file pointing the webserver to yyy.yyy.yyy.yyy and the nameservers and mail server to xxx.xxx.xxx.xxx: $TTL 300 @ 86400 IN SOA ns1.domain.com. admin....
-2
votes
1answer
23 views

Email reception directing the domain request to EC2 instance

I'm not able to receive any emails on my GoDaddy hosted domain after changing the DNS settings for redirecting the domain request to an AWS EC2 instance. Even though it's a common scenario, I would ...
6
votes
1answer
3k views

How can you test a backup / secondary MX server?

I'm wanting to set up a secondary MX server using Postfix but I am wondering what is the best way to test this prior to putting into production (by adding its MX entry)? One possible way is to test ...
0
votes
0answers
46 views

Using MX records for load balancing on *outgoing* email: bad practice?

I operate a Rails application (a Discourse forum) that needs to send out email. My sysadmin told me I shouldn't use a specific outgoing mailserver, but rather specify my domain and have my app lookup ...
1
vote
1answer
28 views

How to redirect MX records to origin domain name?

For a home setup I only have 1 public IPv4. So I have to use it for all my hosts. Luckily I have only one. So in the DNS I use the at sign @ to define the origin, example.com with an A record where I ...
-2
votes
2answers
61 views

Local mail + external Office 365 Exchange account

I'm not an expert at all so I'll try to explain my problem clearly. I've a domain that I manage with cPanel. I've also an Office 365 solution I suscribed directy on the microsoft website. When I did ...
0
votes
1answer
33 views

Mail Clients stopped working after MX Change

At first I was using 'example.com' as my MX record and everything worked fine, IMAP, SMTP, sending mails from the mail clients. And then I changed my mx record to 'mail.example.com' and everything ...
1
vote
2answers
1k views

Transferring emails messages from one server to another

My domain example.com is provided by 1&1, but I recently moved my website server from 1&1 to another server, controlled with my cPanel. I have also been able to set up a user@example.com ...
0
votes
2answers
131 views

How reliable is validating email domain by reverse DNS MX record checking [duplicate]

This question is not about how to protect against spam or validate a particular email user. But how reliable is validating emails domain (does it exists at all) by reverse dns. What are the pitfalls ...
10
votes
3answers
286 views

MX priority server behaviour

This is a question about MX procotol priority. If I have two server as MX with different priority: MX 10 serverA MX 20 serverB Is this guarantee by the protocol that the MX 10 is the prefered? Can ...
0
votes
2answers
32 views

MX record for different email domain

I'd like to create an MX record inside my lan to test a local email server, but with a different domain name. I have a Windows 2012 DC and a domain called company.local, what I'd like to do is to ...
3
votes
1answer
217 views

No MX records?! Zone file for Shopify vs. hosted email

One of my hosting clients has a website: www.vincedevito.ca. Some time ago, he decided to use Shopify as his primary website, but I still host his email. Therefore, I set up a DNS Zone with GoDaddy. ...
0
votes
1answer
98 views

MX records for wildcard and subdomains

I would like to setup the MX nameservers of a domain domain.com so that every income email goes to mailgun (or other inbound email processor), including all the possible subdomains @*anything*.domain....
2
votes
2answers
14k views

1 domain 2 MX ? Is it possiable to set two MX Record for one domain?

I've seen articles about "different subdomains for different MX records". But I want two records for the same domain, @abc.com for example. Originally, I used Live Mail(MSN) to host my emails, and ...
6
votes
4answers
4k views

Do I need SPF, and how do I set it up?

I've read that SPF is a way to ensure that spam sent in my name is evidently fake, and I'd like to use that. How do I set up SPF? Or is it already in effect? I have two domains hosted on Dreamhost.com,...
1
vote
0answers
46 views

Email validation fails on HELO / RCPT TO commands to records

I'm migrating a mailing service from a server to another. Before setting up new mailing list I wanted to process it through an email validtor I've setting up on the server. I basically used this tool ...