Error Codes

SMTP Request Types
----------------------------------------------------------
Rq 0 = connecting to SMTP Server
Rq 1 = sending Helo
Rq 2 = sending Mail (From)
Rq 3 = sending Vrfy
Rq 4 = sending Rcpt (recipients)
Rq 5 = sending Data
Rq 6 = sending Quit
Rq 7 = sending Rset

Winsocket Errors in Numerical Order
----------------------------------------------------------
(10004) Interrupted system call
(10009) Bad file number
(10013) Permission denied
(10014) Bad address
(10022) Invalid argument
(10024) Too many open files
(10035) Operation would block
(10036) Operation now in progress
(10037) Operation already in progress
(10038) Socket operation on non-socket
(10039) Destination address required
(10040) Message too long
(10041) Protocol wrong type for socket
(10042) Bad protocol option
(10043) Protocol not supported
(10044) Socket type not supported
(10045) Operation not supported on socket
(10046) Protocol family not supported
(10047) Address family not supported by protocol family
(10048) Address already in use
(10049) Can't assign requested address
(10050) Network is down
(10051) Network is unreachable
(10052) Net dropped connection or reset
(10053) Software caused connection abort
(10054) Connection reset by peer
(10055) No buffer space available
(10056) Socket is already connected
(10057) Socket is not connected
(10058) Can't send after socket shutdown
(10059) Too many references, can't splice
(10060) Connection timed out
(10061) Connection refused
(10062) Too many levels of symbolic links
(10063) File name too long
(10064) Host is down
(10065) No Route to Host
(10066) Directory not empty
(10067) Too many processes
(10068) Too many users
(10069) Disc Quota Exceeded
(10070) Stale NFS file handle
(10091) Network SubSystem is unavailable
(10092) WINSOCK DLL Version out of range
(10093) Successful WSASTARTUP not yet performed
(10071) Too many levels of remote in path
(11001) Host not found
(11002) Non-Authoritative Host not found
(11003) Non-Recoverable errors: FORMERR, REFUSED, NOTIMP
(11004)* Valid name, no data record of requested type
(11004)* No address, look for MX record

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