[IMail Forum] Delivery problem

[Josh Piche]

We are having difficulty delivering mail to one server (ucalgary.ca).  Pretty much every time I look at spool there are a few files queued up for various clients of that server.  I took a look in the logs, and it doesn't happen 100% of the time.  Some mail sent to ucalgary.ca gets through first try.  Those that don't get through have the following message in the logs: rl-recv: Blocking call cancelled SMTP_DELIV_FAILED Some of these messages to ucalgary.ca have requeued 18 times.   I did notice that this failure also occured with a couple other systems, but ucalgary.ca is persistent.   I'm wondering what the problem is, and if there's anything I can do on my end.     Josh