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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Need to migrate hosting service without email service downtime

I have a client, who uses Gmail with his own domain for email, he updated his mx records and everyting. now we need to switch hosting providers without any email downtime. Email service is really ...
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1answer
81 views

The correct PTR record in DNS

I'm confused with my DNS records. I own a domain (e.g. example.com).I've set A record for my SMTP server (e.g. smtp.example.com) for outgoing emails. The email address is (e.g. ...
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0answers
112 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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1answer
77 views

DNS - How to make existing domain to no longer resolve & maintain functional MX record [duplicate]

I would like an existing domain to no longer resolve (terrible historical SEO? work, content will move to another domain) And at the same time only maintain that domains historical email address for ...
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2answers
5k views

Emails not being delivered to server from certain mail servers: “domain has no valid mail exchangers”

I'm having trouble with a server that I administer. I've been told that a number of emails aren't coming through. These are consistently from certain people. Here's the bounce error that they ...
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1answer
151 views

Why is mail going to an old mailserver after I changed the MX records? [closed]

I have a strange problem. I had to transfer mails from one server to another. I set up a server with QMail and Plesk, and everything is working. I created mail accounts similar to the accounts on the ...
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2answers
63 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
71 views

what're the proper DNS record settings for google apps so that my site hosted on another company can send email that won't consider spam [closed]

I'm using Google apps email and I have a website that's hosted on shared hosting company. How should I configure the DNS records so that incoming mail will get to Google but at the same time email ...
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1answer
84 views

“relay access denied” after changing domain A record

I'm experiencing issues with email, specificially "Relay Access Denied" errors after changing my A record for my apps domain name. It was previously setup like: Host a manages dns (mydomain.com in ...
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1answer
77 views

How does an MX relay work, as in, how is my SMTP server supposed to use it? [closed]

I'm trying to set up a Postfix server (any other software would be ok for me as well). I don't have a static IP, and that can apparently be quite a problem for e-mail purposes: I managed to "send" ...
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0answers
47 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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1answer
61 views

Relay Access Denied - Combined with external mail service

I have a client website which is spitting out this error message after you complete any of the forms: Mistake in recipient address! 554 5.7.1 : Relay access denied Mistake in sending data! 221 ...
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1answer
77 views

smtpdiag tool lists wrong mail servers

I have a weird issue on a server. When i run the smtpdiag tool, it lists the old mail server settings (with mx servers being website.com & mx01.1and1.com). here're the results Checking MX servers ...
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1answer
76 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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2answers
910 views

Backup MX server used to queue mail

In short: I need to setup backup MX server, which will queue messages it receives for later delivery through original MX, AND it must only accept messages for mailboxes which will be listed in ...
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1answer
65 views

Finding valid email service providers in a large list of domains

I have a list of approximately 13K free email/webmail providers from circa 2000. Obviously the vast majority of these services have gone out of business, and the domains have either lapsed, or been ...
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2answers
62 views

Strange MX Record behaviour / Google Apps

If I check my DNS settings on this site (http://www.dnsinspect.com), I find these settings, which are correct in my opinion: Your name servers returned 5 MX records: 1 aspmx.l.google.com. TTL=86400 ...
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2answers
72 views

SPF with a Mail Gateway: do I need to put all my mail servers?

I always put all my Mail Servers in SPF declarations, but I'm not sure if this is the correct way to implement SPF. All my mail got routed through a Mail Gateway. Everything goes first to this server ...
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1answer
901 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 ...
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1answer
187 views

Office 365 shuns MX records

I currently have a domain on Office 365 and I am adding a second one. However, the moment I added the new domain and verified ownership by adding the TXT record, my users on the first domain can no ...
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2answers
61 views

Sending mail from sub-domain on different server from domain getting flagged as spam

Our client owns a server with a domain: website.com We have a server that our client points videos.website.com to. Emails sent from videos.website.com are getting flagged as spam because website.com ...
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1answer
117 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
105 views

can't delete Resource Records through CMD in Windows Sever 2008

Final Update Problem erased in the least acceptable way: After re-installing the DNS-Server lead to even more problems, I re-installed the whole Operating System and - up to now - everything works ...
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0answers
57 views

global autoresponder google apps

We just migrate our main domain to a new one. (@olddomain.com -> @newdomain.com) Now we want that people who send emails to any account in @olddomain.com, receive automatically a message like "the ...
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1answer
121 views

MX records to ensure failure of email delivery

I'm managing a set of domain names that used to have MX records pointing to a hosted mail service. When the hosted email service was deactivated, emails sent to the (now invalid) addresses resulted in ...
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1answer
278 views

A record required for MX record?

Previously our domain, let's call it ourdomain.com, pointed to an IP address (our web host). In addition, we use Office 365 to handle our domain email accounts. DNS records: ourdomain.com A ...
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1answer
2k views

What should be my MX records for postfix configuration like for mail forwarding?

I have a Digital Ocean VPS, at which I installed postfix. I want to do mail forwarding. When I installed postfix I picked No configuration option. Later I set up the following: I created main.cf at ...
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1answer
63 views

Setup Mx record for specific host [closed]

I am trying to set up MX record of my domain to point to the google server. According to the google documents I should enter the following values for MX record of my domain ...
4
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1answer
2k views

Setting myhostname and Mydomain in postfix for mutiple domains

I have 5 domain names currently pointing to my email server, which is running CentOS 6.5 with Postfix, Dovecot installed. Although I am now only able to receive emails but not send (for reasons I ...
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2answers
1k views

Sender address rejected (mx record not found)

I am using both Exim and Office 365 to send email - the server sends automated mails from an application using Exim and Office 365 handles day to day user and incoming email etc. I am getting some ...
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1answer
235 views

Setting MX entries for Failover [closed]

I have a GoDaddy domain as "example.com". I wanted to have my own DNS server for the sub domain secure.example.com. So I added a "A" record "NS" pointing to my IP and a NS record "Secure" pointed to ...
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1answer
48 views

Removing non-0 priority MX records

I have MX records set up as such: 0: domain.com (runs of the webhost, really bad) 1: GOOGLE ... google I somehow accidentally added the Google Apps mx servers, btu didn't change the priority 0 ...
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1answer
231 views

Mail Server with different IP than Web Server [closed]

I recently had a problem. Somebody hacked a Wordpress Site of one of my customers and sent about 70.000 Spam Emails. So my Server IP got blacklisted on some Providers. I'm looking now for a solution ...
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2answers
2k views

Mailserver and MX records in Cloudflare

I built my own mail server using postfix/dovecot in CentOS 6, this is my postconf -n results: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin ...
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1answer
66 views

How to DNS emails to vhosted domain to separate server than website

I apologize if this is a duplicate, but I'm not sure of the correct phrases to search to ensure this hasn't been solved yet. I have 2 servers, with PTR records of domain.com and mail.domain.com. The ...
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1answer
328 views

Using alternate server for specific subdomain - DNS settings

I'm trying to set up DNS records for a domain name, such that mail.domain.com uses a server that is different from any other request to *.domain.com. As I've been going about trying to figure out how ...
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3answers
57 views

Does a host/domain used solely for MX records pointing elsewhere need an A record?

I've got a domain on dns.he.net that only has an SOA record, NS records, and one MX (pointing to a totally different host). Does my domain need an A record? Currently nslookup fails since there is no ...
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2answers
60 views

Do I need an MX record for my main domain?

Let's say I have several domains. bossguy.com is the domain that hosts my mail (IMAP server) and where I ssh in to manage other domains, for example: domain1.com domain2.com domain3.com It makes ...
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3answers
124 views

How to forward a mail server without MX records?

My company is switching from an old clunky dedicated email server (which we can't maintain anymore) to Google Apps email, and we'd like to start using the Google email now, as the old server regularly ...
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1answer
65 views

TTL on DNS for domains as a security measure [closed]

Ever since I read this article the other day, I've felt a bit uncomfortable about my domains being stolen. And I've tried taking each measure possible. But one I don't understand completely is TTL. ...
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2answers
75 views

Using Gmail apps. New VPS. All mail working except incoming mail to @domain.com emails sent from server

So I just noticed this issue, and it's rather urgent we find a solution, it's literally been ongoing unnoticed several days, as any communication being sent to us from our email forms and offer forms ...
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2answers
272 views

MX lookup failed

This is a part of my dns-zone file: ;; MX Records mx.domain.de. 300 IN MX 1 direct.domain.de. ;; CNAME Records www.domain.de. 300 IN CNAME domain.de. mail.domain.de. 300 IN CNAME ...
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3answers
51 views

Can I use MX Record Configuration to send one account's email to one server and a second account's email to a different server? [closed]

For example, let's say my MX Record(s) specify: 0 server1 mydomainexample.com 1 server2 mydomainexample.com Now let's say: me@mydomainexample.com is an account on server1 and ...
1
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1answer
429 views

Setup backup mail server for Exchange

I am running an Exchange 2013 with about 10 domain names. I currently use DynDNS' backup MX service - which covers a single domain per license. I want to look into creating my own backup MX service ...
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1answer
205 views

How to override an MX value for a particular domain using a transport_maps but have some form of redundancy

I have a postfix mail server and I want to override an MX value for a particular domain. From my understanding this is can be done by the use of transport_maps ...
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1answer
31 views

Emails on other server, dns & mx

I must host emails on other server, my way was: Edit DNS to my server MX Record edit in the zone file (editing with a GUI) If I change for example SOA serial, retry, refresh then are my changes ...
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1answer
58 views

One domain but two MX records for two group of accounts

Here is what I want to try: One Domain: mydomain.com; Two MX Records: one is MX1 (Exchange), the other one is MX2 (Google Apps) Two group of accounts: Teacher accounts are in Exchange; Student ...
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1answer
435 views

Reverse DNS to match Sophos name, or mail server name

I think this is a simple question with a simple answer. Our domain, cory.co.uk, reports a DNS mismatch when you do and SMTP test on mxtoolbox.com. I think this is causing issues sending to some ...
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1answer
116 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
50 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 ...