In the GPEDIT policy editor or from the Group Policy Management Console, go to User Configuration > Administrative Templates > Microsoft Outlook 2016 amend number by version > Account Settings > Exchange. It seems, that there is maybe something going on with the generated Letsencrypt certificates and Apple. Consider activating Outlook’s Disable Autodiscover protection using Group Policy. Select the POP or IMAP option and then click Next. The websites can be browsed and the mail-server delivers the e-mails.Īll domains are fully secured by Letsencrypt (Mail, wildcard, webmail, etc.). Select the Manual setup or additional server types option and then click Next. Brings back: MX preference 10, mail exchanger. A secure connection to the server cannot be established."ĭuring my investigation whats going on I mentioned that all hosted websites of this server couldnt be displayed by any browser running on MacOS or iOS. In plesk I have activated email, created an email address, opened the correct SMTP and POP3 / IMAP ports and secured the emails with a lets encrypt certificate. Sometimes a message pops up like this one: "An SSL error has occurred. Email header analysis reports SPF failed for localhost IP on mail sent from Plesk hosted mailbox: SPF Authentication : SPF Failed for IP - 127.0.0.1. When deploying Exchange Server 2019, you should create an Autodiscover CNAME record in DNS for the email domain that you intend to use. You can set up Microsoft Office Outlook automatically (using the mail autodiscover feature) or manually. But Apple Mail said that the mailserver did not respond. Dovecot warnings in mail log: You can get a new clean config file with: doveconf -Pn > nf. Once considered a pain to set up, Autodiscover setup is now rather simple, because all it requires is a CNAME record in the public DNS for the email domain. So I double checked the settings and ports on the client side but everything was fine. I have the same issue after migrating 2 sites to an already smooth running server.Īfter migration, the owner of these two sites complained about a non-functional mailserver because he doesnt receive any e-mail and Aplle Mail did not connect to the server.
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