Hi, We are using ACCPAC (a 3rd party finance package) to send out emails which include the remittance advice as an attachment. When the email is sent Exchange bounces back a message saying: Undeliverable Your message did not reach some or all of the intended recipients..... ..... The following recipients could not be reached: email address that the message was sent to and a date/time stamp Unable to deliver the message due to a recipient problem MSEXCH:MEExchangeIS:DOMAINNAME:SERVERNAME The email address is valid in all senses - as the same Outlook client can send a manual email to the address without any problems....When looking at the actual email sent there appears to be nothing strange or incorrect about it.... If anyone is able to offer any advice on what might be happening here I would be more than grateful. Thanks and Regards Troy Disclaimer: The information in this electronic mail message together with any attachments is confidential. It is intended solely for the addressee. Access to this Internet electronic mail message by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it is prohibited and may be unlawful. Linfox accepts no responsibility for any effects this email message or attachments has on the recipient network or computer system.