Sender issue
I was having a weird connection issue with one of my sites this week and actually for the last few weeks. I tried everything I could remotely though another admin but it just wasn't getting resolved so I decided to go on site today. Here is the error I was seeing in the sender.log
There is no existing connection, Win32 error = 1907 SMS_LAN_SENDER 10/23/2007 8:22:33 AM 7420 (0x1CFC)
There is no existing connection, Win32 error = 53 SMS_LAN_SENDER 10/23/2007 8:22:36 AM 8128 (0x1FC0)
There is no existing connection, Win32 error = 5 SMS_LAN_SENDER 10/23/2007 8:22:56 AM 5304 (0x14B8)
The weird error was the 1907 this means "The user's password must be changed before logging on the first time." Thanks Steve Thompson for that translation.
Error 5: Access Denied
Error 53: problem in NetBIOS name resolution
Anyway here is the solution:
Here was the problem. Someone had checked off "User Must Change Password at next logon" My guess is this caused the account to get locked out. This would explain the error 1907 and error 5. Not sure why it was also getting 53 but anyway...
I removed the checkmark and changed the password on the local account and the sender account and now everything is happy. 