New server, new IP address, same domain name?
Could be that you're dealing with DNS transition delays.  Check the TTLs on 
your domain records!
-------- Original message --------From: "Fazzina, Angelo" 
<[email protected]> Date: 10/2/17  1:24 PM  (GMT-07:00) To: 
[email protected], [email protected] Subject: RE: Trouble sending 
email to myself on new server i am building 
Hi, sorry if I posted in non-plain text format, did not know that was an issue. 
Will watch for it next time.

I have gone through 2 guys in security/networking department today and was able 
to finally prove it was firewall and not my postfix config being "wrong".

I even turned off SELinux and iptables...

Hopefully by Wednesday I can send email.   Issue closed for now, thanks.


-ANGELO FAZZINA

UITS Service Manager:
Spam and Virus Prevention
Mass Mailing
G Suite/Gmail

[email protected]
University of Connecticut,  UITS, SSG, Server Systems
860-486-9075


-----Original Message-----
From: [email protected] [mailto:[email protected]] 
On Behalf Of Noel Jones
Sent: Monday, October 2, 2017 3:54 PM
To: [email protected]
Subject: Re: Trouble sending email to myself on new server i am building

[Please use plain text next time. Thanks]

On 10/2/2017 1:31 PM, Fazzina, Angelo wrote:
> 
> Oct  2 14:24:43 mta5 postfix/smtp[13114]: connect to
> uconn-mail-onmicrosoft-com.mail.protection.outlook.com[207.46.163.106]:25:
> Connection timed out

"connection timed out" almost always means some sort of network
error outside of postfix, such as a firewall problem.




  -- Noel Jones

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