MX records for wildcard and subdomains

Question

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.com except @hq.domain.com that uses Google Apps.

MX servers for Google Apps are:

 MX 1 ASPMX.L.GOOGLE.COM.
 MX 5 ALT1.ASPMX.L.GOOGLE.COM.
 MX 5 ALT2.ASPMX.L.GOOGLE.COM.
 MX 10 ASPMX2.GOOGLEMAIL.COM.
 MX 10 ASPMX3.GOOGLEMAIL.COM.

MX servers for Mailgun are:

MX mxa.mailgun.org 
MX mxb.mailgun.org

Is this possible to do?

its already answered, search next time @ http://serverfault.com/a/54807/315572 — Vasil Jamalashvili, Nov 23 '15 at 13:26
This question is different. I need to receive **all** the possible subdomains in mailgun, not just domain.com, except hq.domain.com that is processed by Google Apps. — Victor, Nov 23 '15 at 13:31

Vasil Jamalashvili · Answer 1 · 2015-11-23T13:33:54.217

2

in you case

hq               IN      MX      1       ASPMX.L.GOOGLE.COM.
hq               IN      MX      5       ALT1.ASPMX.L.GOOGLE.COM.
hq               IN      MX      5       ALT2.ASPMX.L.GOOGLE.COM.
hq               IN      MX      10      ASPMX2.GOOGLEMAIL.COM.
hq               IN      MX      10      ASPMX3.GOOGLEMAIL.COM.
qh               IN      MX      10      ASPMX4.GOOGLEMAIL.COM.
hq               IN      MX      10      ASPMX5.GOOGLEMAIL.COM.
@          IN      MX      10      mxa.mailgun.org.
@          IN      MX      10      mxb.mailgun.org.
*.domain.com.       IN  MX  10 mxa.mailgun.org.
*.domain.com.       IN  MX  10 mxb.mailgun.org.

edited Nov 23 '15 at 13:33

answered Nov 23 '15 at 13:29

Vasil Jamalashvili

31
5

Thank you for your answer. Will I be able to receive, for example, mails for [email protected] in Mailgun and be sure that [email protected] is received in Google Apps? – Victor Nov 23 '15 at 13:33
i have edited answer and added wildcard mx, you should receive [email protected] at google apps and all other user@*.domain.com at mailgun, hope this helps – Vasil Jamalashvili Nov 23 '15 at 13:34
p.s : wildcard MX is documented at http://tools.ietf.org/html/rfc1912#section-2.7 – Vasil Jamalashvili Nov 23 '15 at 13:36
1

@VasilJamalashvili The wildcard will only be used for names that don't appear explicitly in the domain. Wildcards are not type-specific, so an A record for `www.mailgun.com` will prevent the wildcard from being used for mail to `[email protected]`. – Barmar Nov 23 '15 at 20:20
@Barmar thanks for correction, as i imagine, separate mx records must be added for each existing subdomain, i don't see any other solution. – Vasil Jamalashvili Nov 24 '15 at 03:51
The best solution is to configure your outgoing mail so it doesn't use subdomains in the `From` addresses, then you shouldn't have to worry about incoming mail to subdomains. – Barmar Nov 24 '15 at 05:19
@barmar question was about incoming mail, outgoing mail will always work if there is correct mx record and ptr – Vasil Jamalashvili Nov 24 '15 at 17:52

MX records for wildcard and subdomains

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