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Is there a limit to the number of recipients I can send emails to in a day?

There is a restriction on the number of messages that can be sent:

  • Outside of UCL - restriction is 1,000 recipients
  • Inside of UCL - no restriction

If you send a message from your UCL account (outside of UCL) to a distribution of over 1,000 recipients, you will receive the following error:

550 Administrative prohibition
What are the alternatives?

1. Send the emails from within UCL via the smtp-server.ucl.ac.uk. There are no limits on outgoing emails from a machine on the UCL network. 

2. Set up a Mailman mailing list. This is a more efficient way of sending out a large number of emails.