Unhandled exceptions crashing node

Nobody has claimed this yet.

I've had a case where two different errors with my smtp server were both resulting in unhandled exceptions that crashed node.

v0.6.4 and node 0.4.8

// First problem happened when Google blocked our account, but this was causing node_error to throw an async unhandled exception

FATALNODEERROR::2011-08-04T06:41:48
STACK:Error: 535-5.7.1 Username and Password not accepted. Learn more at

535 5.7.1 http://mail.google.com/support/bin/answer.py?answer=14257 q4sm1075005ib
b.49
at SMTPClient._dataListener (/usr/local/lib/node/mailer/node_modules/nodemail
er/lib/smtp.js:466:29)
at SMTPClient. (/usr/local/lib/node/mailer/node_modules/nodemailer/lib/smtp.js:643:14)
at CleartextStream. (native)
at CleartextStream.emit (events.js:64:17)
at CleartextStream._push (tls.js:299:12)
at SecurePair.cycle (tls.js:574:20)
at EncryptedStream.write (tls.js:96:13) at Socket.ondata (stream.js:36:26)
at Socket.emit (events.js:64:17) at Socket._onReadable (net.js:678:14)
ARGUMENTS:
TYPE:
MESSAGE:535-5.7.1 Username and Password not accepted. Learn more at

535 5.7.1 http://mail.google.com/support/bin/answer.py?answer=14257 q4sm1075005ib
b.49
TOSTRING:Error: 535-5.7.1 Username and Password not accepted. Learn more at

535 5.7.1 http://mail.google.com/support/bin/answer.py?answer=14257 q4sm1075005ib
b.49

// Second problem was when we switched to a local mail server (exim4) for sending mail and we got this problem

FATALNODEERROR::2011-08-04T07:11:53
STACK:Error: Server responded with 421 admin-01 lost input connection
at SMTPClient._handshakeListener (/usr/local/lib/node/mailer/node_modules/nod
emailer/lib/smtp.js:502:21)
at SMTPClient. (/usr/local/lib/node/mailer/node_modules/nodemailer
/lib/smtp.js:628:21)
at Socket. (native) at Socket.emit (events.js:64:17)
at Socket._onReadable (net.js:678:14) at IOWatcher.onReadable [as callback](net.js:177:10)
ARGUMENTS:
TYPE:
MESSAGE:Server responded with 421 admin-01 lost input connection
TOSTRING:Error: Server responded with 421 admin-01 lost input connection

Start by reading lib/smtp.js around the reported _dataListener line 466 and _handshakeListener line 502, then trace how node_error handles these SMTP responses. Reproduce the Gmail authentication and Exim4 421 cases if the old runtime is available; done means both errors follow the library's normal error path without an unhandled exception crashing Node.

Written by the indexing model from the issue text.