Why google smtp does not stops when sent a single . dot after new line character while inputing data

3
votes

When I am trying to send mail to google smtp server at alt1.aspmx.l.google.com on port number 25 it behaves normal but when I enter data and press a single dot after new line it still does not stop accepting data and keep accepting.

====

Look at following conversation


nc alt1.aspmx.l.google.com 25

mx.google.com at your service
HELO ashish
250 mx.google.com at your service
MAIL FROM:[email protected]
250 2.1.0 OK hn8si29938637igb.69
RCPT TO:[email protected]
250 2.1.5 OK hn8si29938637igb.69
DATA
354 Go ahead hn8si29938637igb.69
Header blah blah
This is ashish.
Now you should stop
.
.

==============

I expect that server should ideally say 250 Ok after seeing a . but it doesn't

Am I making any mistake, I hope not because same sequence of command works well with other SMTP servers. Is there any special diff rule to mention end of data while using Google smtp ?? :(

1
smtp
ok ... Am I making any mistake. If not, why is not it working for me ? – Point Networks
On what OS are you? I tried your steps with putty. Which client are you using? Are you sending CRLF and not just LF (that is a config option in some terminal emulators)? – rene
I am on Linux (Opensuse Linux 12.1) Connceting with netcat – Point Networks
Can you try with a plain telnet? I expect nc to send only LF (0xa( instead of CRLF (0xd 0xa) – rene
ok thanx for mentioning what you think. You were correct rene, it was due to exact problem what u thought. I used nc again but this time to send CRLF I used Control-V then Return and Return again. – Point Networks

1 Answers

1
votes

I know this is an old post, but you may want to use nc -C