25: connection timed out 6

How to configure PXE boot server in Linux using Red Hat 6 How to check and update planned day light saving (DST) changes (timezone) in Linux Configuration … SMTP Connection Timed Out - Sending emails from web application We have a website online that uses a form to capture data and then send that data to an email address via PHP's sendmail() function. If the IP is blacklisted on any one of the Microsoft partner RBL, connections from the IP will not be accepted by office 365. White list your web server outgoing IP on Office 365 connection filter. Remove the IP from blacklist if in case blacklisted. It isn't, that was one of the first things I checked. If it fails on port 587, possibly due to certificate or  TLS version issue, try relaying through the port 25 with SMTP authentication. My SMTP settings are as listed in this article: https://support.office.com/en-us/article/POP-and-IMAP-settings-for-Outlook-Office-365-for-business-7fc677eb-2491-4cbc-8153-8e7113525f6c. Please verify and make sure the web server IP is not blacklisted on any of the Microsoft partner blacklist. The idea is to have a server side application to talk to. How can I remedy this? Office 365 if it's not blacklisted. The IP of my server is 201.151.95.123 . Which will bypass connection filtering on EAC > Protection > Connection filter > Allow list. Good evening: I have also the same problema.No can send mails to some domains and remain in deferred . Now, as this has been an old answer to the question (2011 back then), I am updating this answer, as there seemed to be a lot of people still wondering how to do this. When we try to submit the We are trying to use the SMTP settings for our Office 365 email to send mail for the application. form, it is saying that the connection timed out while trying to reach the SMTP server. Configure inbound connector Office 365 by specifying the source IP as your web server IP. – Daniel Baktiar Mar 28 '17 at 9:25 You can follow the question or vote as helpful, but you cannot reply to this thread. We are trying to use the SMTP settings for our Office 365 email to send mail for the application. Thanks for your feedback, it helps us improve the site. I did figure out what was causing it. If you are not using SMTP authentication, specify the smart host as Office 365 MX record for the respective domain and use port no 25, Smart host : domain-com.mail.protection.outlook.com. This thread is locked. https://blogs.technet.microsoft.com/eopinsights/2015/10/09/dnsbls-rbls-and-office-365/, EAC > Mail flow > Connector > Direction 'Your org e-mail server' to 'Office 365'. We have a website online that uses a form to capture data and then send that data to an email address via PHP's sendmail() function. But don't understand why to some mtas and not others.

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