# Troubleshooting Standard UM

## SMTP-forwarded voice mail fails to reach the e-mail server destination

There are many cases where SMTP forwarding could fail:

1. Invalid address (not reaching an e-mail server)

2. SMTP server temporarily unavailable (e-mail server down)

3. Invalid user (user not valid in e-mail server)

4. Account is full.

Cases 1 and 2 are very similar from the point of view of the SMTP client. The message will not be able to reach an SMTP server.

In cases 3 and 4, the forwarded messages will be delivered to the SMTP server, but the message may bounce back in the form of a reject message. NuPoint Unified Messaging will not attempt to parse those reject messages or to inform the administrator about the failure.

At all times, NuPoint Unified Messaging will keep the messages to be SMTP-forwarded in an SMTP queue. NuPoint Unified Messaging will only remove the messages from that queue when the message is finally delivered to an SMTP server, when the end user removes the message from his/her inbox, or when the age limit timer for the message has been reached.

The amount of retries and time between the retries that the NuPoint Unified Messaging system will attempt to deliver the message to the SMTP server will be configured on a sendmail.cfg file and will not be presented in the menus. When changing the parameters registered in this configuration file, a reboot will be needed for the changes to take place.