Can't send emails to mailboxes at btinternet.com

[lovereading]

We run an online book store at lovereading.co.uk where our clients can also read book reviews. We send 3 newsletters a month to our subscribers and clients however every time we attempt to send it to the group of btinternet mailbox users we see following bounce code:

smtp;421 rgin01.bt.int.cpcloud.co.uk Service not available - too many connections

only the "rgin01" part changes for different bounces. The number ranges from rgin01 to rgin09

Is there any way we can restore our ability to reach btinternet mailboxes?

[markp]

Hi lovereading,

from that error, it looks like the BT residential/home email servers are rejecting the mail as they think it is spam.  I would suggest speaking to them to see if you can get the block removed from there servers.

Mark

[lovereading]

Hi Mark,

thank you for helping me. Could you please point me to the right direction? Where can I reach someone in charge of removing the block from our IPs?

Peter

[markp]

@lovereading 

You can contact the residential/home broadband support on 0800 111 4567 or on www.bt.com/chat

Mark