Show Posts
This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.
Pages: [1]
1
Postfix / 365 servers cannot be reached. (mail.protection.outlook.com) (no ban)
« on: November 20, 2016, 12:09:36 PM »
Hello everyone.
I found problems reaching Microsoft 365 mail servers.
The following error occures:
I can send mail to Gmail/Hotmail/Outlook.com/Live and receive it.
Also the problem occures on other Centospanel servers.
Could it be that I need a real SSL certificate and not self signed?
When I test it on testconnectivity.microsoft.com there are no problems. Everything is in the green! (No ban)
All rbl's in the green.
Maybe the *.mail.protection.outlook.com having problems with selfsigned certificates?
I found problems reaching Microsoft 365 mail servers.
The following error occures:
Code: [Select]
Nov 20 12:57:12 4 postfix/smtp[1592]: EED7AC1A5C: to=<p***@****.com>, relay=***-com.mail.protection.outlook.com[213.199.180.170]:25, delay=96174, delays=96158/0/15/0.26, dsn=4.4.4, status=deferred (host *****-com.mail.protection.outlook.com[213.199.180.170] said: 451 4.4.4 Temporary server error. Please try again later ATTR5 (in reply to MAIL FROM command))I can send mail to Gmail/Hotmail/Outlook.com/Live and receive it.
Also the problem occures on other Centospanel servers.
Could it be that I need a real SSL certificate and not self signed?
When I test it on testconnectivity.microsoft.com there are no problems. Everything is in the green! (No ban)
All rbl's in the green.
Maybe the *.mail.protection.outlook.com having problems with selfsigned certificates?
Pages: [1]
