Cfmail "failto" not working with non-existent internal email addresses

Question

We've hard-coded cfmail TO value in many places across many
applications, i.e.
<cfmail to="[email protected];[email protected];[email protected]"
...>
Suppose when one of the users (user1,user2, user3) left
company and his email address was removed from the MS Exchange
server, cfmail would fail saying
A problem occurred when attempting to deliver mail.This
exception was caused by: javax.mail.SendFailedException: Invalid
Addresses; nested exception is: class
javax.mail.SendFailedException:
550 5.1.1 User unknown
in the server exception log and cfmail wouldn't report the
error to the email address of "failto".
So I'm wondering if it's possible to have cfmail ignore the
bad one(s) and continue to send the email? Or is there anything I
should do with the Exchange server?
Advice is much appreciated.

Answer 1

Thank you, Dan.
Sorry, what I meant by "non-existent" is not quite
straightforward. Let me explain this way:
I observed the problem only occurred to emails of our
company. For instance: our company's email address ends with
@abc.com.
my email address: [email protected]
my previous colleague's address: [email protected] (he's gone and
the email is invalid / deactivated now)
my client's email: [email protected] (used to be valid)
If I code this way:
<cfmail to="[email protected]" failto="[email protected]"...>
"failto" does work and I got the email.
but if these:
<cfmail to="[email protected]" failto="[email protected]"...>
<cfmail to="[email protected];[email protected]"
failto="[email protected]"...>
I never got emails reporting the failure but error lines in
the mail log and the exceptions log which read:
"Error","scheduler-3","01/28/09","11:55:32",,"Invalid
Addresses"
"Error","scheduler-3","01/28/09","11:55:32",,"Invalid
Addresses"
javax.mail.SendFailedException: Invalid Addresses;
nested exception is:
com.sun.mail.smtp.SMTPAddressFailedException: 550 5.1.1 User
unknown
at
com.sun.mail.smtp.SMTPTransport.rcptTo(SMTPTransport.java:1196)
at
com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:584)
at coldfusion.mail.MailSpooler.deliver(MailSpooler.java:832)
at
coldfusion.mail.MailSpooler.sendMail(MailSpooler.java:731)
at
coldfusion.mail.MailSpooler.deliverStandard(MailSpooler.java:1021)
at coldfusion.mail.MailSpooler.run(MailSpooler.java:986)
at coldfusion.scheduling.ThreadPool.run(ThreadPool.java:201)
at
coldfusion.scheduling.WorkerThread.run(WorkerThread.java:71)
Caused by: com.sun.mail.smtp.SMTPAddressFailedException: 550
5.1.1 User unknown
at
com.sun.mail.smtp.SMTPTransport.rcptTo(SMTPTransport.java:1047)
... 7 more