Mailbox users can set their own Junk email controls using Outlook or Outlook Web App, including blocking senders.
When a mailbox user blocks a sender the sender’s email address is added to the “Blocked Senders” list, visible in Outlook’s Junk Email Options.
This list is also accessible in Outlook Web App, by navigating to the Options (by clicking the gear icon in the top right) and looking in the “block and allow” section.
When an email address is blocked like this any email messages from the sender will go to that user’s junk email folder. However, if Safelist Aggregation is being used the emails will be rejected by the server instead. The sender will receive an NDR with information similar to this:
Delivery to the following recipient failed permanently:
alan.reid@exchangeserverpro.net
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain exchangeserverpro.net by maila.locklan.com.au. [58.7.213.10].The error that the other server returned was:
554 5.1.0 Sender denied
The user in your organization can remove the email address from their blocked sender list, and then a safelist update will stop the server from blocking those emails.
However, there are situations where the person may not be capable of removing the blocked sender, or you may simply want to do it yourself as the Exchange administrator. In these cases you can manage a mailbox’s junk email configuration using PowerShell.
Running Get-MailboxJunkEmailConfiguration will allow you to see the current trusted and blocked email addresses for that mailbox user.
[PS] C:\>Get-MailboxJunkEmailConfiguration alan.reid
RunspaceId : 11371828-d5da-40c3-a9fc-fc287c2fcf0a
Enabled : True
TrustedListsOnly : False
ContactsTrusted : True
TrustedSendersAndDomains : {}
BlockedSendersAndDomains : {alan.oliveirabio@yahoo.com.br, exchangeserverpro@gmail.com, info@globalsales.co.cc,
register@ebrguide.net, service@paypal.net}
MailboxOwnerId : exchangeserverpro.net/Company/Head Office/Users/Alan.Reid
Identity : exchangeserverpro.net/Company/Head Office/Users/Alan.Reid
IsValid : True
ObjectState : Unchanged
To remove an item from the BlockedSendersAndDomains use Set-MailboxJunkEmailConfiguration.
[PS] C:\>Set-MailboxJunkEmailConfiguration alan.reid -BlockedSendersAndDomains @{remove="exchangeserverpro@gmail.com"}
The above command will remove exchangeserverpro@gmail.com from the BlockedSendersAndDomains but leave the other entries in place.
[PS] C:\>Get-MailboxJunkEmailConfiguration alan.reid
RunspaceId : 11371828-d5da-40c3-a9fc-fc287c2fcf0a
Enabled : True
TrustedListsOnly : False
ContactsTrusted : True
TrustedSendersAndDomains : {}
BlockedSendersAndDomains : {alan.oliveirabio@yahoo.com.br, info@globalsales.co.cc, register@ebrguide.net,
service@paypal.net}
MailboxOwnerId : exchangeserverpro.net/Company/Head Office/Users/Alan.Reid
Identity : exchangeserverpro.net/Company/Head Office/Users/Alan.Reid
IsValid : True
ObjectState : Unchanged
Make sure you update Safelist Aggregation again after making the change by running Update-Safelist.
[PS] C:\>Update-SafeList alan.reid
When that sender sends to the mailbox they will no longer be blocked by the mailbox’s junk email configuration.
This article SMTP 554 5.1.0 Sender Denied Caused by Mailbox Junk Email Configuration is © 2014 ExchangeServerPro.com
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