I'm running two TB clients from one install - never had any problems. I've just updated to 24.4.0 and one of these installs works fine the other won't receive or send e-mails. I get the following error. Sending of message failed. The message could not be sent because connecting to SMTP server mail.just-2bme.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your SMTP server settings are correct and try again, or contact the server administrator. It doesn't matter which SMTP server I use - I've 4 that (usually) work, no matter which I use I get the same problem. I can use the same SMTP server to send as the other install - the other install works, this one doesn't. VERY ODD.