Sounds like connection limits to me. "x recipients per message" "x messages per connection" "x concurrent connections per IP"
Try sending fewer messages per connection. Sure it will take longer, but better than none.. I was working with a federal agency that would only accept 25 messages/25 recipients per connection. Ended up having them setup a local DL and I simply sent to that. On Wed, May 12, 2010 at 3:36 PM, stan <[email protected]> wrote: > Unfortunatly, I did not have logging on but will turn it on tonight and > then try to send them another email with more than 100 recipents and will > see how i goes. > > ----------------------- > > Do you have SMTP logging enabled? �What do the conversations look like? > > ----------- > On Wed, May 12, 2010 at 5:07 PM, stan wrote: > > They say since the email dose not reach their server, then it is not their > fault and refusing to answer if there is a limit on the number of recipints > or not. We never had problems sending emails to their domain in bulk. What > I'm getting is connection refused when I checked the queue for emails being > retried. > > ------------------------------------------- > > > Volume spam filtering on their end? Have them check their quarantine. > > -------------------------------------- > > On Wed, May 12, 2010 at 4:39 PM, stan wrote: > > We have exchange 2003 server and just this Monday we started having an > issue with emails sent to one domain in particular. > We have no problems sending and receiving emails to users in this domain. > But when we try to send a bulk email to over 100 recipients in that domain, > we notice that the emails don't get delivered and the our server retry to > send the bulk email for 2 days and then fail. I see that the connection is > refused by the host from the exchange manager on this connector. If we cut > down the recipient list to let's say 50, then the email get delivered right > away. > Now, they say that this is not there issue because the delay is from our > side. I checked the recipients number and the limit is 5000 from our server. > How can I tell if this is from our end or theirs? > Since these emails were time sensitive, we deleted the emails that waiting > for retry from the queue and sent few emails with smaller recipients > numbers. > > > > >
