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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21
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Best Practices for preventing you from looking like a spammer [duplicate]

I'd like to feel more confident setting up mail for my clients with regards to false positives. Here's what I know: SPF records are good, but not every spam filter service/software (SFSS) uses ...
0
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5answers
547 views

Many domains/sites hosted on same server, CNAME alternatives to avoid writing same IP in DNS?

I have many sites (each one with its own domain) all on the same cPanel hosted server (let's say server IP is 1.1.1.1 and server main domain is myserver.com) All these domains use third party DNS ...
56
votes
6answers
8k views

Why can't MX records point to an IP address?

I understand you should not point a MX record at an IP address directly, but should instead point it to an A record, which, in turns, points to the IP address of your mail server. But, in principle, ...
23
votes
7answers
58k views

Can you lookup a domains past nameserver & mx record history?

If is possible to find out which nameservers a domain was previously pointing too? I need to try and find where a domain was previously hosted so that I can try and gain access to an old hosted email ...
8
votes
3answers
5k views

DNS: Is it valid to have an “MX” record and no “A” record?

Say you own a abcd.com and you only want to use it to send and receive email via bob@abcd.com. You don't want to provide any kind of website. Can you set up the DNS records to include an "MX" record ...
10
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2answers
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Can you reference a CNAME record in an MX record?

We have several domains all pointing their MX records at mail.ourdomain.com, an internal mail server. We are looking to outsource our email to a new supplier, who would like us to use ...
2
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1answer
893 views

Move primary domain hosting from GoDaddy, but keep email & subdomains there w/ non-GoDaddy registrar

Given a domain registered through DotRegistrar, with GoDaddy as the current host (shared hosting) I need to figure out how to move the hosting for the primary domain to another hosting provider ...
1
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1answer
43 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 ...
0
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1answer
214 views

How can I disable local mail delivery in Centos? [closed]

I want to disable local mail on my Centos VPS because the I have a web form (on a website which is hosted by the VPS) which is delivering mail to the local mailbox rather than looking at MX records to ...
0
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3answers
746 views

Using a CNAME to forward traffic from a naked domain [duplicate]

I have a domain, flyh2.com. I use a CNAME to forward www.flyh2.com to flyh2.elasticbeanstalk.com where my web site is hosted. This is the only way Amazon allows custom domain names. A records aren't ...
3
votes
4answers
18k views

How do I set an MX record in Route53 for a GoDaddy domain?

Can't seem to find an answer to this question on AWS' forum, not in the Route53 manual, nor on Stackoverflow/Serverfault in a way that makes sense...and GoDaddy's support sure as heck ain't got an ...
2
votes
4answers
13k views

Can I use multiple email servers at once?

I was wondering: Can you use multiple email servers at once? In this case, I was going to add all the Google Apps MX records then add the MX records of another email server. My goal here is to only ...
1
vote
3answers
472 views

How to make sure that in case of our mail server being unreachable (connection down) mail still gets queued and resent once it's back up?

We have had some issues with losing internet connection once in a while. Normally that would mean our mail server is unreachable and incoming email is bouncing. We've set up MX Backup (second MX ...
4
votes
5answers
4k views

How do I setup a secondary incoming mail server?

I currently have a server running Debian 6, with postfix and dovecot handling email. This server hosts email for a number of domains and users, so I use MySQL as my backing store for users and ...
3
votes
1answer
889 views

sendmail: forward wildcard MX to a single email address

I'm trying to set up sendmail to forward all email to *@ *.crm.mycompany.com to crm@mycompany.com. Unfortunately my sendmail-fu isn't up to it and I can't find anything useful on Google. My plan was ...
2
votes
4answers
254 views

Does sending e-mail in the name of customers increase the risk of being marked as spammer?

We are developing a SaaS website application that lets users send invoices to their clients. Ideally, these e-mails should appear to be originating from our customers, so the sender e-mail address ...
8
votes
5answers
1k views

Under what circumstances (if any) should an MX record point to localhost?

I'm thinking that there's absolutely no reason or justification for this, but before I open my mouth and get some admin in deep kimchi, I thought I should ask. Is there any circumstance in which an ...
4
votes
1answer
1k views

is there any way to determine the date a domain DNS record like MX record was published?

We need a way to determine when exactly a DNS record such as MX was published for a domain. Does anyone have a clue?
4
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2answers
9k views

Can an email server be set-up on an Azure VM?

I am considering the possibility of setting up a simple SMTP+IMAP email server for internal use on an extra small Azure VM. When I say internal use I don't mean "used by internal users", but for use ...
3
votes
3answers
307 views

MX or A record issues

We have a mail server (Mailenable) which we are using to sell email accounts to our clients. We have one client that could not send email to a specific domain and they receieve this error from the ...
3
votes
1answer
305 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 ...
3
votes
2answers
325 views

Forwarding-service for emails on external hoster by MX-record

I am registering domains on behalf of customers and host their websites on my server. I have complete control over the DNS setup of my customer domains. I still want to host their websites, but I ...
3
votes
5answers
818 views

Fixing typos in user-entered email addresses

We see some typo domains in our mail queue from time to time and I have been thinking of using our internal DNS server to correct these people's mistakes. Some examples from the current mail queue: ...
2
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1answer
49 views

SMTP service detection

I have some basic questions regarding SMTP connections, particularly for Postfix but would appreciate advice for MS Exchange too: When a single relay for a given remote domain becomes unavailable, ...
2
votes
3answers
512 views

DNS, should I be using A instead of CNAME?

I'm doing a big reshuffle of our websites and hosting, moving about 10 domains to a new server. In doing so I had to make some changes to the DNS, pointing all of the domains at the new server. ...
1
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1answer
54 views

postfix destination full/busy/error try another destination

Does anyone know if it is possible to setup postfix with a destination for a domain. If that destination (which is also running postfix) can't accept the mail because it's disk is full or it is ...
1
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3answers
1k views

MX Record for SubDomains

I want to be able to send email to any subdomain I like and not have to configure A records and MX records for each subdomain. Ideally I could send an email to test@a.domain.com and test@z.domain.com ...
1
vote
3answers
3k views

Lots of emails I send bounce back

I am running an Ubuntu 10.04 LTS server and Amazon EC2. Just booted the community, installed apache2, php5, sendmail... thats about it. Didn't change anything in the configurations. Last night I send ...
1
vote
4answers
232 views

SMTP server requirements

Could someone help answer a few questions regarding the networking / DNS requirements for an SMTP server? Assume the server is setup already. Is a MX record required for SMTP? TCP port 25 open to the ...
0
votes
2answers
205 views

How to block IP addresses from port 25 [closed]

PROBLEM: Users are getting 15-20 SPAM emails per hour, even with SpamAssassin set to its most aggressive settings SOLUTION: SPAM filtering services are available from companies like McAfee (Intel). ...
0
votes
1answer
623 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 ...
0
votes
1answer
722 views

How to set up different MX records for outbound and inbound email?

I would like to use my own outbound email server Haraka with Node.js and Google Apps for inbound mail. Now my domain registrar gives one click Google Apps setup, however I've already set up my own ...
0
votes
3answers
3k views

Dynamic IP and MX Record

I have read that I "must not" use CNAMEs in MX record entries. My in-house mail server is connected to the internet with a provider where the IP changes every two/three months. I have a subdomain ...
0
votes
1answer
188 views

My email server is classed as a spammer by hotmail

I created an email server hosted at IP 65.75.241.26 with domain www.softmail.me using which I can send and receive emails from all users and I don't have problem with any other except hotmail. That my ...