Smartermail not recieving mail on azure

Problem reported by Kenneth Voss - 9/14/2015 at 8:46 AM

Submitted

I've been having smartermail server running under azure VM for quite a while now, after migrating VM to another subscription I don't recieve mails anymore- outgoing mail still works!!

domain is seesharper.dk

Any help would be appreciated

- Kenneth

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Bruce Barnes Replied

9/14/2015 at 12:30 PM

You haven't setup a HOST RECORD for your MX server

You need to setup an A or HOST record for you MX server so that MAIL.SEESHARPER.DK points to 137.135.140.169

NOTE: YOU CAN NOT USE A CNAME RECORD FOR MAIL SERVERS - CNAME RECORDS ARE NOT ALLOWED.

As a matter of general principal, you should avoid using CNAME records whenever possible and create HOST records.

Mail Servers Have A No Records

FAIL: I've found mail servers without A records:

mail.seesharper.dk. → ?

To reach your mail servers via IPv4 an A record is needed for each mail server.

Bruce Barnes ChicagoNetTech Inc brucecnt@comcast.net Phonr: (773) 491-9019 Phone: (224) 444-0169 E-Mail and DNS Security Specialist Network Security Specialist Customer Service Portal: https://portal.chicagonettech.com Website: https://www.ChicagoNetTech.com Security Blog: http://networkbastion.blogspot.com/ Web and E-Mail Hosting, E-Mail Security and Consulting

Kenneth Voss Replied

9/14/2015 at 12:34 PM

Like this??

Thanks for helping by the way :)

Employee Replied

9/14/2015 at 3:15 PM

Employee Post

Hi Ken. I'm still not seeing valid MX records for your domain. You can see that here. If you have indeed added MX records to your DNS, then that may take time to propagate.

Kenneth Voss Replied

9/15/2015 at 4:25 AM

Hi Rod.

Could you pls guide me to set up valid MX records for my domain??

- Kenneth

Bruce Barnes Replied

9/15/2015 at 9:18 AM

Kenneth: will need several different DNS records for your e-mail to function properly.

HOST record, mapping the FQDN of your MX server to the PUBLIC IP ADDRESS on which the server is installed

MX record, mapping the SmarterMail server to the HOST record you setup avove

rDNS record, mapping a REVERSE of the host record, back to the IP address.

Then there are several elective records, all of which are highly recommended:

Here are a few examples, based on having SSL/TLS enabled and using IIS, vs the SmarterMail web server, which is designed only to get SmarterMail setup.:

A good beginner's guide to DNS is DNS and BIND from O'Reilly.

Here's a link to the book, on Amazon: http://www.amazon.com/DNS-BIND-5th-Edition-Cricket/dp/0596100574

You may also be able to find outtakes of various sections, as PDF files, via a Google search.

Remember, too, that you'll need to

setup the ports in SmarterMail
map the ports to your IP ADDRESS
map your IP ADDRESS to the FQDN of your SmarterMail HOSTNAME
setup an rDNS to HOSTNAME MAPPING through your internet bandwidth provider, in this case, Azure

and, once that's done, you'll need to open the ports for each of the items mapped above in your firewall.

Kenneth Voss Replied

9/16/2015 at 11:12 AM

I did above - and still not working.. I can send mail internally when on server, but not from google to my mail, port 25 is open in firewall but cannot connect from tellnet unless I use local ip port 25

Bruce Barnes Replied

9/16/2015 at 12:54 PM

Sounds like you do not have local to PUBLIC, STATIC IP address mapping configured in your router or firewall.

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