![]() ![]() I'm going to make a lot of assumptions here. Who can help to find a solution for this problem? I am not sure as a part of the solution to turn off reqired authentification for Local to Local on my Internet IP range due to security reason? or? I cant use IP ranges to exclude office 365 cos i dont have all the office 365 IP adresses and I cant imagine to manage all the ranges in time to have permament working solution. Problem is that office 365 have milions of ip adresses and you never know which one is used to deliver email so i dont know what to do? Sending emails from Exchange online to IMAP users end with this error 550 5.0.350 Remote server returned an error -> 530 SMTP authentication is required. SPF record was modified so that now include also a office 365 sendouts ![]() Sending emails from Office 365 to external works fine. Receving emails from external works fine for IMAP users as well as for Exchnage online users. This email forwarding what was set works fine. ![]() Two users which have mailbox on Exchange online have thier Hmail mailbox forwarded to Office 365 account like emails from IMAP users to Exchange online user works fine. Mx record is pointed to my hmail server as before.Īll emails received for this domain are managed by hmailserver. Hmail stay as default SMTP server for that domain. I would have 2 users on Office 365 Exchange online and 8 users on Hmail server using the same internet domain. Now I need move 2 user/mailboxes to Office 365 to Exchange online. Please, who can help with Hmail as a part of hybrid solution with Exchanage online? ![]()
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