Office365 not receiving emails from email systems from outside Microsoft Hosted systems.

[jac_95]

Hi all,

I have Business Essentials, which allows me to create upto so many email accounts using Office365 with the domain (in the format of domainP1-domainP2.org.uk) for free. This came when I purchased a domain from BT Business.

I'm able to send emails fine, however it seems that only users who use one of Microsofts email systems (eg Outlook or Office365) can only reach my email address eg info@domainP1-domainP2.org.uk.

Other email providers who don't use a Microsoft hosted system to route their emails, can't seem to reach one of my domain address.

It only effects the email accounts that use my domain, domainP1-domainP2.org.uk. btconnect.com account is not effected.

Some of the bounce back replies I get are below:

Technical details of temporary failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain domainP1-domainP2.org.uk by domainP1-domainP2-org-uk.mail.protection.outlook.com. [207.46.163.215].

The error that the other server returned was:
451 Temporary local problem - please retry later

AND:

Technical details of temporary failure:
DNS Error: Address resolution of ms85753994.msv1.invalid. failed: Domain name not found

The DNS records are shown below:

Type Key Value Priority (MX)

CNAME	autodiscover	autodiscover.outlook.com
CNAME	sip	sipdir.online.lync.com
CNAME	lyncdiscover	webdir.online.lync.com
CNAME	mail	Mail.btconnect.com
MX	@	domainP1-domainP2-org-uk.mail.protection.outlook.com	1
TXT	domainP1-domainP2.org.uk	google-site-verification=YiOXqOO3H4_ZVBhmWD285YVmko_K_cVZ0Zd0unMoQ4g
CNAME	ez72xge3fcr4	gv-zbotyjiuppafak.dv.googlehosted.com
CNAME	www	ghs.googlehosted.com
TXT	@	v=spf1 include:spf.protection.outlook.com -all
MX	@	ms81404801.msv1.invalid	50
MX	@	ms85753994.msv1.invalid	50
A	@	74.125.133.121

[jac_95 · Accepted solution]

This is now fixed.

Solution was to change the mx record, due to using a domain with a hythen, from

MX	@	domainP1-domainP2-org-uk.mail.protection.outlook.com	1

to:

MX	@	domainP1-domainP2-org-uk02i.mail.protection.outlook.com	1