Problems with Indonesian ISPs?

I'm getting a lot of returned mail, but generally only from addressees in Indonesia.

If you have any idea why this is happening or are having similar problems and Indosat is your ISP, please leave a message in the comment box. Or you could try to send me an email ........

These are samples of my returned email messages.

1. The original message was received at Wed, 19 Sep 2007 13:21:50 +0700 from ppp181-141-id.indosat.net.id while talking to in-mta2.plasa.com.:
<<< 421 Too many concurrent SMTP connections; please try again later.

2. while talking to mx2.mail.ukl.yahoo.com.:
<<< 421 Message temporarily deferred - 4.16.51

3. from ppp159-141-id.indosat.net.id
... Deferred
Warning: message still undelivered after 4 hours
Will keep trying until message is 1 day old

4. from ppp3-jkt2.indosat.net.id
Deferred: Connection reset by mail2.thejakartapost.com.
Message could not be delivered for 1 day
Message will be deleted from queue
 

postID=4676650193087831010

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