[SATLUG] Slow Email Sending

[Samuel Leon]

Ok I got a funny question.  Why do some emails get sent really slow?  I 
run my own email server.  Sending emails locally is instant.  I just 
right now made a new account and it was working fine locally.  I tested 
it remotely by sending an email to it from myway.com, gmail, and juno. 
I waited and waited.  10 minutes passed and still nothing.  I finally 
tried sending it an email from a remote email server that a friend runs 
(it relays off of a grande communications server).  I checked the logs 
on his side and everything looks fine:

to=<xxx at xxx.xxx>, relay=mail.grandecom.net[66.90.130.74]:25, delay=0.79, 
delays=0.17/0.02/0.16/0.43, dsn=2.0.0, status=sent (250 2.0.0 
lA47ktr03001 Message accepted for delivery)

Yet here it is an hour later and I still have nothing.  Lucky some of 
the other emails I sent from the other servers are starting to trickle 
in.  I don't think this problem is on my side.  I have never seen delays 
like this though.  Is this just typical of enterprise level servers? 
Some kind of queue where the messages wait in line for hours waiting to 
be scanned/sent?

Also I see in the log clip above "delays=" and "delay=".  Is that some 
kind of local statistic or what?  I can't find anything on google.

Thanks,
Sam