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.

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DNS MX vs CNAME entries

I have recently bought a domain for setting up a website. The website is hosted on OpenShift. Since OpenShift doesn't use its own nameservers, I've edited the DNS records on the domain registrar's ...
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2answers
90 views

Receiving mail in a python process on an aws instance

I'm using a Python smptd server on an AWS instance. It's listening on localhost, port 25. I can send mail to it through a Python smtp client on the same instance. I have an elastic IP associated with ...
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1answer
52 views

Originating (non-critical) emails from a “less-trusted” host

Background We have a webapp running on webapp.example.com that (amongst other things) sends messages by email from time to time. These messages are non-critical: whilst we would like to make a best ...
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1answer
56 views

BIND int/ext views, need to return ext MX to int clients

Any DNS pros out there? I have a problem that's stumping me. I have a BIND DNS server that (with views), supports both internal and external DNS. All internal clients look at the internal view for ...
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1answer
96 views

Exchange 2003 issue after changing external DNS mx record

We currently use an external spam filter service that forwards our incoming mail to our internal exchange server. We have decided to stop this service and use Sophos pure messgage on our exchange ...
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1answer
25 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 ...
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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 ...
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1answer
2k 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 ...
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1answer
86 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....
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1answer
136 views

MX Record For Hosted Domain

I have an exchange server with multiple domains hosted on it. Lets say these are the domains. company1.com (main), company2.com, company3.com The server uses email.company1.com for its name on the ...
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1answer
778 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 ...
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1answer
206 views

Dns filezone setup with mx and spf

I am trying to create a mail server. I bought the domain mastermails.info on godaddy.com. I am struggling with the setup of DNS. Whenever I change something in the MX record to make my server ...
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1answer
172 views

DNS Redirect Website to another Server

I have two servers, server 1 and server2. The name serververs of the domain points to server1. 1.I have this configuration regarding Server1 DNS Zones: domain.com. 1200 IN A server2-ip Edit ...
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1answer
47 views

Next Step in Migrating Exchange 2003 to GMail (SPF risks when changing MX record vs disable SMTP)

Our company has been struggling to migrate Exchange to GMail for last 2 years (I will leave this for /r/talesfromtechsupport). We have two domains on two different ccTLDs, and lately Exchange is just ...
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1answer
674 views

Switching hosting, keeping mx records

Nice to meet you all! Here is my dilemma: I have to move a website to another hosting but keep the domain. The client currently has email set up with google apps and the mx records are set up ...
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1answer
848 views

Configure server to foward unroutable emails to another email server

Is it possible to configure a Linux mail server (we're running exim) to forward unhandled emails to another server? Here's an example of what I'm trying to accomplish: an email get's send to user@...
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1answer
722 views

sendmail - local mail delivery if user exists, otherwise to external mail server?

i have a debian vps with webmin, The TLD for the server has its MX pointing to a different server, I would like it so any mail generated locally, say by the shopping cart would be relayed/...
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1answer
195 views

rDNS setup to prevent emails appearing as spam / phishing messages

We are trying to send email without the email appearing in the spam folder. The emails that we are sending is solicited bulk email. The main problem is that the emails are appearing as phishing ...
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1answer
78 views

How to forward emails from a domain to 2 different servers?

I am not sure the title describes my problem properly, so let me explain. I have a domain called example.com. I have currently set it up for email services from Microsoft Live domains. I have done ...
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1answer
69 views

MX DNS one IP two domains

I have two domains: 'example.com' and 'elpmaxe.org' and a server - 'server.example.com' At the moment the mail for 'example.com' is hosted elsewhere so I have set up postfix, dovecot etc to be able ...
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1answer
590 views

Mail rejected if it is a reply to previous mail

I have the problem that a server is rejecting emails from my mail server if they are replies to previous mails. If a new mail is sent it can be delivered. Either I receive this error message host ...
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1answer
204 views

SMTP - Routing in RFC 821 and RFC 2821

RFC 821 indicates that the MAIL verb can be given a <forward-path> argument of the form "@ONE,@TWO:JOE@THREE" to indicate intermediate routing hosts (@ONE,@TWO) and the final receiver of the ...
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1answer
60 views

Server is able to receive mail, but mail it sends never get to destination?

I have a OS X Server behind a router. Server's ip address is 10.0.1.3. The router has open ports on everything and an external ip. I've setup my mail exchange. I can receive mail people send to me ...
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1answer
185 views

Email-only hosted in Godaddy and website hosted in my server

so there is the thing. The domain registar is Godaddy.I want the email account to stay in godaddy and the website to another machine. i changed the domains nameservers from godaddy panel to point my ...
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1answer
507 views

Google Apps - Wildcard MX record to handle multiple sub domain aliases

I have added several wildcard MX records on my Domain Management Console, which all point to Google Email server and their backup email servers, e.g. 10 *.mydomain.net ASPMX.L.GOOGLE.COM ...
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1answer
197 views

Xmail shows error at Gmail

Hello I am using Xmail server at IP 65.75.241.26 hosted at www.softmail.me using which I can send and receive email to/from all email service providers but unable to receive back from Gmail. This ...
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1answer
236 views

rDNS mx record problem, smtp test fails

down vote favorite I am doing test at mxtoolbox.com ptr: ip -> mydomain.com mx: mydomain.com ->myip but smtp:173.231.15.144 -> OK - myip resolves to myip.hosted.static.hostingfirm.com / Warning - ...
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1answer
505 views

Exchange 2010 High Availability two sites mx records

I currently have two sites where one is just a spoke that talks back the exchange server at the main site. Luckily I'm finally getting some bandwidth between the two and I'm trying to figure out a ...
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1answer
442 views

Hosting mail for domain separately - using Godaddy/Plesk/MediaTemple/Heroku

So currently I have a domain name managed through godaddy. Its hosted on Heroku, and I use custom DNS zones through godaddy, as heroku doesn't host email. I have a mediatemple account, which I'd ...
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1answer
215 views

Can you set default MX records for all forward zones within DNS (Windows Server 2008)

Is there a way to set some default MX records that are added to any new forward zone that is created within the DNS manager in Windows 2008 Standard? If not is there a command line I can run to add ...
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1answer
427 views

Moved DNS and Email Hosting, Now Can't Send/Receive To/From Domains Hosted on Previous Host

Our company had 4 domains whose emails and DNS were hosted by usintegration.com, and then we moved the email and DNS hosting for 3 of the 4 domains to a new company. Now, the 3 domains that were moved ...
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1answer
60 views

How do I configure postfix to deliver mail to the first MX record only?

Currently have a postfix server running as a backup mail server for several different domains. So when the primary mail server goes down, email will go to the backup server (second in the order of MX)....
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1answer
111 views

Change MX record to another server

I have a host-machine with Centos 7 and a guest machine with Centos 6.6. I want my guest to be a mail server on dedicated static ip for all my domains (on the same host-ip and not). P.S. I use Postfix+...
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1answer
79 views

How to set up email forward via DNS

We currently have old_domain.com as the primary domain in google mail and new_domain.com as an alias. We want to change new_domain.com to the primary domain. Unfortunately google has a 24 hour lock on ...
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votes
1answer
145 views

A-Record to point to hosting vs. changing DNS while keeping the mail externally

I currently am dealing with a client whose e-mail is hosted on Google. We are just in the process of taking over their domain, but their current hosting company suggests a different set up than I do ...
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1answer
22 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 ...
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0answers
199 views

Exchange 2007 not delivering to primary MX of one domain

I'm trying to send email to a domain that has two MX records. The higher priority record is IPv4 and the 2nd is IPv6. Exchange gives me a delivery is delayed message in my inbox after I've tried to ...
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0answers
538 views

Why does RFC 2181 disallow MX record with a CNAME exchange?

According to RFC 2181 http://tools.ietf.org/html/rfc2181#section-10.3 10.3. MX and NS records The domain name used as the value of a NS resource record, or part of the value of a MX ...
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28 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 ...
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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 ...
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0answers
141 views

Error when delivering email to Gmail from my server, and MX records for sub-domains

I hope I'm posting in the right forum. I'm having some trouble with email being sent from a forum I run. The email is coming directly from the sub-domain, as in notifications@community.example.com (...
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0answers
68 views

Create an MX record alias?

I have a domain example "copperwidgetmakers.com" for this domain, I get mail at washers@copperwidgetmakers.com. A few months ago we got annoyed at typing this in twitter and other sites and we ...
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0answers
236 views

Windows Server 2008 DNS server CNAME resolution and TTLs

We have a Windows 2008 SP2 DNS server configured to use root hints. We have a certain MX record lookup that it periodically fails to resolve for our client machines. The lookup is for the MX record ...
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0answers
223 views

Disable local delivery ONLY for authenticated users in Qmail

We are moving some mailboxes and servers. I'm looking for a way to use remote delivery (with normal MX lookup) instead of local delivery ONLY for authenticated users, in Qmail. connection to port 25 ...
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0answers
55 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 ...
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0answers
45 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 ...
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0answers
83 views

Exchange with Postfix MX for technical accounts in same DOMAIN

I have organization configured with Exchange 2007 server with many technical accounts. I would like to migrate technical account to Postfix server with same domain At the moment my structure is: ...
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0answers
78 views

Bind caching nameserver MX lookup error for Low TTL Records

We are running Bind (9.8) as Caching Nameserver on a CentOS 6.x based mail server. We get frequent domain not found error for certain domains resulting in mail delivery failure. It was discovered ...
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0answers
157 views

DNS - Multiple MX records not working for a single domain

I have one domain, let's call it example.com with 2 MX records. The first record points to my on site Exchange 2013 server with a priority of zero, making it the preferred server. The second record ...
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0answers
179 views

Mail not getting to users on Google when MX records specified in Amazon Route 53

I configured the MX on my Amazon AWS Route53 and I was told that some of the users don't get any emails with this domain. When I send myself an email everything works fine now, and I doubt that ...