51 votes
Accepted

DNS MX/SPF/DMARC records without actuall emails on domain

The point would largely boil down to being a good citizen and reducing abuse, like making your domain less useful for spammers to impersonate and to make it immediately clear to others that mail is ...
Håkan Lindqvist's user avatar
44 votes
Accepted

Is it bad practice to declare MX from differing networks?

They are mostly wrong. It is not a bad practice to have more than one MX, and it's equally not a bad practice to have one or more of them with a hostname in another domain. In fact, it used to be ...
Jenny D's user avatar
  • 28.1k
24 votes

Is it bad practice to declare MX from differing networks?

No, this is BS. Having this option is one of the main reasons why you can specify multiple MXs with different priorities in the first place. There must be another problem.
Sven's user avatar
  • 99.3k
22 votes
Accepted

Multiple MX Records handling

MX records are used according to priority value in the records. The record with the lowest priority is used first, then the higher ones until one responds. If there are multiple records with the same ...
Stuggi's user avatar
  • 3,566
16 votes
Accepted

Issue Creating Two MX Records with Different Priority Using Google Domains

You should click the Edit button in the MX record that Google considers valid, click '+' and add the second MX record
J.M. Robles's user avatar
  • 1,080
14 votes
Accepted

MX priority server behaviour

Under normal circumstances the server will connect to the first one that is available, but there are many reasons the first one may be unavailable to one person but not the next. Some of these reasons ...
Drifter104's user avatar
  • 3,813
14 votes
Accepted

record DKIM on IONOS makes sense?

it is IONOS who signs those emails, right? It would be, if they signed them. But they don't. (But they should.) Here are some excerpts of a conversation I had less than 10 minutes ago with their ...
JamesTheAwesomeDude's user avatar
13 votes
Accepted

MX record with only one dot, possible?

An MX record consisting of only a single dot . is a Null MX as defined in RFC 7505. It means that the domain doesn't accept any email.
AlexD's user avatar
  • 9,849
12 votes
Accepted

MX records, better setup for load balancing and failover

The RFC's that specify how a MTA should handle MX records are RFC974, RFC1123 section 5.3.4, RFC2821 section 5 and RFC5321 section 5. RFC974 status is now HISTORIC. According to it, MTA's are ...
Anderson Medeiros Gomes's user avatar
12 votes
Accepted

Why would email deliver normally when MX Lookup test returns "DNS Record not found"?

Your domain does not have an MX record. But an MTA is listening on the A record's IP, and that is the fallback of SMTP in case there is no MX record.
Hauke Laging's user avatar
  • 5,325
11 votes
Accepted

Why isn't the MX record propagating after pointing a domain to Yahoo Mail Server?

I took a look, unfortunately I couldn't find an MX record, the SOA record shows me that something was last changed to the dns records on March 23. When did you make your changes? ;kmtc.com.sa. ...
jbot's user avatar
  • 126
11 votes

Why isn't the MX record propagating after pointing a domain to Yahoo Mail Server?

DNS doesn't propagate; the responses from authoritative servers are cached by the recursive servers. Currently your authoritative servers are responding with an empty set of MX records, so they are ...
Esa Jokinen's user avatar
  • 49.4k
10 votes
Accepted

Do I need an SSL certificate for a .DEV TLD on an MX record?

No, or not necessarily. .dev like all new Google TLDs (including .new in one month) has been added to the HSTS Preloading list. It means that all names under this TLD will force browsers (because ...
Patrick Mevzek's user avatar
10 votes

Multiple MX Records handling

MX records cannot solve this, multiple records (with possibly different priorities) can be used for redundancy, but the service is expected to be the same (accept the same addresses). What you can do ...
Håkan Lindqvist's user avatar
9 votes

Are SPF needed for domains that do not send mails and do not have MX record?

If you don't intend to send mail from this domain, why let anyone else to use it as they wish? But things have changed since this question was asked eight years ago. SPF can only protect your domain ...
Esa Jokinen's user avatar
  • 49.4k
9 votes
Accepted

Is an MX-record required on a domain to send emails only?

No and yes. By standard, your sender domain is not required to have an MX record. RFC 5321 makes an MX record optional. However, an MX record is somewhat of a standard today. Due to spamming practices,...
Zac67's user avatar
  • 11.4k
8 votes
Accepted

Postfix: Name service error for name=domain.com type=MX: Host not found, try again

Well, this is embarrassing. As I predicted my problem was caused by the most obvious and trivial reason: lack of read access to /etc/resolv.conf for the postfix user o_0 As you probably know the ...
Ismael Olea's user avatar
7 votes
Accepted

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

You can combine them all like this. v=spf1 a mx ptr ip4:x.x.x.x ip4:y.y.y.y include:mktomail.com include:icpbounce.com include:spf.mandrillapp.com -all I recommend changing the ~all to -all - ...
Henry's user avatar
  • 940
7 votes
Accepted

Recover Live.com Custom Domain MX Records

This took many, many, many hours of Google-Fu (about 18 hours, give or take). You have to first log in to your Outlook.com account that you're missing your records on. This must be done on a browser ...
jparnell8839's user avatar
7 votes
Accepted

Why do I see so many domains from businesses without MX records?

These sites are misconfigured. Roughly 15 years ago such configuration would be a sure pointer to an IT department running on windows without a clue about the internet. This hasn't changed much. Many ...
Broco's user avatar
  • 2,019
7 votes

Base64 encoded MX records in TXT records

My guess is this: NOTE 1:In case you do not want to interrupt the functionality of current email services before the creation of mailboxes with us we have an alternative verification method that ...
Mark Wagner's user avatar
  • 18.1k
6 votes

Benefits of using a subdomain for sending email?

A big advantage is that most email spammer-blacklist organizations treat subdomains separately. So, even if your automated e-mail subdomain gets blocklisted (PC term for blacklist), your main domain ...
vacip's user avatar
  • 193
6 votes
Accepted

How to set up mx records

The problem seems to be that you have other servers than your mail server listed in your MX record, one of which has a lower priority. MX records work on a lowest-priority-first basis, which means ...
MadHatter's user avatar
  • 80.4k
6 votes
Accepted

MX Dns Record Not Detected

You have much bigger problems in play here. When I attempted to run a dig +trace +additional on your domain, this is what I saw at the tail end of the output: heeldiaries.com. 172800 IN ...
Andrew B's user avatar
  • 33k
6 votes
Accepted

Does MX Record forward or redirect?

MX records are essentially signposts for email delivery - emails are never stored by intermediate servers, only forwarded to their final destination. So, in your words, the mails are redirected, ...
Craig Watson's user avatar
  • 9,660
6 votes

Correct basic mail DNS records

When other people will write to [email protected], all SMTP servers in the world will search for the relevant server(s) handling emails for @mydomain.com. For that, they will check the DNS for MX ...
Patrick Mevzek's user avatar
6 votes
Accepted

DNS CNAME Resolution - which IP would be returned?

You'd get: an.example.com. IN MX 10 pc2.an.example.com pc2.an.example.com. IN CNAME pc1.an.example.com. pc1.an.example.com. IN A 123.45.67.2 There can't exists another resourse record like A or ...
Esa Jokinen's user avatar
  • 49.4k
6 votes
Accepted

Moving DNS hosting for Active site to Route 53 - with G Suite MX TTL of 1 week

As long as you create the MX record exactly the same in Route53 as it currently is in GoDaddy you don't need to change its TTL. Likewise with all the other records - A, CNAME, etc. Only NS records ...
MLu's user avatar
  • 25.3k
6 votes

SMTP banner mismatch with multiple MX records

You only need to worry about what the banner name is when mail2 is used to send an outgoing mail. And in that case, it should still match the reverse DNS for the IP it is using. About the only thing ...
ivanivan's user avatar
  • 1,488
6 votes
Accepted

Setting up an MX record for a send-only server

Domains that send email but do not receive email will generate issues and/or be flagged as potential SPAM sources. Since you are sending email, you are expected to be able to receive bounce, ...
John Hanley's user avatar
  • 4,904

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