com.sun.mail.smtp.SMTPSendFailedException: [EOF]

[Guest]

We are seeing this error since going to ColdFusion 10 enterprise. We have installed all the updates. Server is Windows 2008 64-bit with all the latest updates applied.

This appears to be very random, but it is causing some headaches with the mail spool. If 10 emails are in the queue, 9 will go out and 1 will go to undelivr even though all the parameters are the same. We move the file back to the spool and it goes through.

Right now I am dedicating a resource to monitor the spool so all emails go out (we send out hundreds per day from our app) but we need some type of resolution. Any help is appreciated!

[Grouchy-One]

I am having the exact same issue. I have not been able to identify the cause. The only thing I can add in my case is it seems to happen at certain times of the day when our mail firewall spam filter is in heavy use. All messages that are put into the undelivered folder go through 100% when they are re-spooled.

[Guest]

We tracked this down to some update after update 9 or 10. We wound up re-installing CF completely and only applying the mandatory update. Mail has been running smoothly since then. We'll be holding off on applying any other updates until Adobe can get these issues resolved.