https://business.forums.bt.com/t5/Archive/Rate-Limiting/m-p/75188#M20359 <P>We been receiving the below error when trying to deliver to BT.&nbsp;</P><P>&nbsp;</P><P>"smtp;421 Too many messages (1.5.6.1)"</P><P>&nbsp;</P><P>We have adjusted the number of connections we make to BT all the way down to 1 connection, only allowing 30 minutes via that connection, and 30 minutes intervals between connections.</P><P>&nbsp;</P><P>Does anyone know what is an acceptable number of connections, meesages per connection, and time frame at which said number of connections can be made?</P> Thu, 09 Apr 2015 13:56:36 GMT mbeaugh 2015-04-09T13:56:36Z https://business.forums.bt.com/t5/Archive/Rate-Limiting/m-p/75188#M20359 <P>We been receiving the below error when trying to deliver to BT.&nbsp;</P><P>&nbsp;</P><P>"smtp;421 Too many messages (1.5.6.1)"</P><P>&nbsp;</P><P>We have adjusted the number of connections we make to BT all the way down to 1 connection, only allowing 30 minutes via that connection, and 30 minutes intervals between connections.</P><P>&nbsp;</P><P>Does anyone know what is an acceptable number of connections, meesages per connection, and time frame at which said number of connections can be made?</P> Thu, 09 Apr 2015 13:56:36 GMT https://business.forums.bt.com/t5/Archive/Rate-Limiting/m-p/75188#M20359 mbeaugh 2015-04-09T13:56:36Z