Enter in String

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Good Morning,

I'm making a program to send a few e-mails. I'm talking to smtp.sapo.pt
but a have a problem.
When a link with the server i receive this message

Quote:
"220 SAPO.pt PTMailServer mta15 ESMTP SPF1"

by using c sockets and telnet.

Then i reply in c this command

C#

tester=send(sock,"MAIL FROM: brunoteixeira92@sapo.pt",34,0);
tester=recv(sock,buffer,buf,0);

If i do this in telnet in responds "250 ok" but if i send it throw sockets it returns once again

Quote:
"220 SAPO.pt PTMailServer mta15 ESMTP SPF1"

I think that the server isn't processing my command. i think that i need to include a enter in my string.

Need help, ty

Posted 30-Nov-11 22:03pm

Cr4zYPT

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2 solutions

Solution 2

You need to send a "HELO" command first to initiate a mail exchange, as described in RFC 2821[^].

Posted 30-Nov-11 23:05pm

Richard MacCutchan

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OriginalGriff · Accepted Answer · 2011-11-30T22:08:00

Solution 1

Try "\n" and/or "\r" in your string - it depends on the remote equipment whether it wants CR or LF or CR+LF (probably "\r" for CR will do, but try "\n" first).

Posted 30-Nov-11 22:08pm

OriginalGriff

Comments

markkuk 1-Dec-11 5:59am

SMTP standard requires that lines end with the CR+LF combination.