Exactly the same problem here. Release 8.7.11_GA_1854.RHEL7_64_20170531151956 RHEL7_64 FOSS edition. I've installed a commerciale certificate via this guide: section Single-Node Commercial Certificate https://wiki.zimbra.com/wiki/Administration_Console_and_CLI_Certificate_Tools after the deployment...

Exactly the same problem here. Release 8.7.11_GA_1854.RHEL7_64_20170531151956 RHEL7_64 FOSS edition. I've installed a commerciale certificate via this guide: section Single-Node Commercial Certificate https://wiki.zimbra.com/wiki/Administration_Console_and_CLI_Certificate_Tools after the deployment ...

Ok, migration procedure will need a lot of time, there is a way to skip this problem and let the server send email on 587? I need to remove the certificate?
new server
Release 8.7.11_GA_1854.RHEL7_64_20170531151956 RHEL7_64 FOSS edition.

Ok, problem found! I start from a false assumption, the old server HAD a valid comodo certificate,
now I had to migrate it, I'm googling for a correct procedure.

I've got some more information from the administrator of the sending server: System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure. I use a self signed certificate, they download the server cerrtificate on their machine but no...

Hi, I apologise for my luck of understandig of the question, but I need to solve this problem. A customer is trying to send mail via submission port 587 using a .net application after a sever migration, the remote ip of the sender is not in "mynetworks" I need to add it? I made some test f...

Thank you, allready done, it's an unexisting user (how to avoid zimbra sending message from unexistent user on the server?) The server is the second listed (priority 70 versus priority 30 of the worcking mail server) in the MX record The other server never went down. mail.domain.com point to the act...

Any hint?
Do you need other information?

Hi, big trouble here, I'm migrating a server, zimbra 8.0.6, due to my concerns on security and other reasons. I'm still configuring it, but one think really set me on concern! I've migrated user and email, but user are still using the old server...but into the daily report I see "a lot" (f...

Hi, thank you for the reply, i need to full understand the DNS setup. Each of my mail server is pointed (direct and reverse) by severNumber.myinfrastructuredomain.com then I point the customer domain to the server ip of their mail server dig mail.customer.com --> ip of the server dig -x ip of the se...