We have a problem when sending email to DL. Our infrastructure is we have 2 exchange and AD different forest (contoso.som and fabrikam.com). Both forest are for our subsidary company. Authorised user from contoso.com will send an email to all staff at fabrikam.com. The issue is some of user at fabrikam.com unable to receive the email. I checked at messaging log at contoso.com and fabrikam.com exchange domain but no mail queue found for those user. I have access right on both forest.
I created a CONTACT for all DL staff (fabrikam) at Contoso.com domain so that the authorized user at Contoso.com domain able to send from her Outlook and webmail.
The distribution settings is:
At fabrikam.com, there is all staff DL created with
a) "Accept the message from following user" - I created a CONTACT for auhtorized user (contoso.com) in fabrikam.com exchange forest and add this authorized user list.
b) The "Require all user are authenticated" is CHECKED by default.
When authorized user at fabrikam.com domain send to all staff, the mail able to reach their all staff.
I already checked on user who unable to receive this email, there is no rules, forwarding and etc on their Outlook and Mailbox. I have no clue now.
I already change the settings on all staff DL(fabrikam.com).
b) The "Require all user are authenticated" is UNCHECKED by default.
The problem still persist.