Occassionally, Nexus may reject a message that you send and return a report of a failed delivery such as the following:
Delivery has failed to these recipients or distribution lists: email@example.com.
The exact reason for failure is given under the heading Diagnostic information for administrators. Below we give some explanations of the common failures including the instructions how to resolve them.
1. 550-RPT-UNK: Recipient unknown
To find the email address of a member of the University go to University Contact Search.
2. 550 5.1.1 RESOLVER.ADR.ExRecipNotFound
If the offending email address is reported to be something like
IMCEAEX-_O=NEXUS_OU=EXCHANGE+20ADMINISTRATIVE...RECIPIENTS_CNfirstname.lastname@example.org it is likely that your email client attempted to use a Nexus internal address of this recipient. This sometimes happens if you email them before their account was migrated to Nexus and your email client remembered their old internal address that is now no longer valid. To resolve this problem you must delete the address that is cached in your client.
DELto remove it from the list of suggestions.
To:field but then press
CTRL+Kto initiate a search for this person on Nexus.
To:button and select the person from the list there.
The incorrect entry in your autocomplete list will be replaced with the newly selected address book entry.
If the format of the address does not match the above then another server refused to take delivery of your message. Scroll down through the message and look for any information returned by the remote email server that may indicate why this has occured.
3. #554 5.6.0 STOREDRV.Deliver; Corrupt message content
This error message indicates that the message sent was corrupt in some way.
The most common cause of this problem is that some (older) versions of Thunderbird or Firefox and their derivatives incorrectly send some attachments, which Nexus refuses to accept. The setting appears to be preserved in the profile folder and hence it may also happen even if you have the latest version of Thunderbird or Firefox.
C:\Documents and Settings\USERNAME\Application Data\Thunderbird\Profiles\RANDOM.default
C:\Documents and Settings\USERNAME\Application Data\Mozilla\Firefox\Profiles\RANDOM.default