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Johannes Geyer · Guest

When sending some html emails to a qmail server, I received a socket error
10054 Connection reset by peer. Sometimes the qmail server sent me the
message:
451 See http://pobox.com/~djb/docs/smtplf.html
You can find here that bare LF are not allowed for SMTP.

After some debugging I found out that the problem was in the quotedprintable
encoding (Indy 9.0.18 IdCoderQuotedPrintable line 250):
if Length(Line) > 71 then
begin
NewLine;
end; //if Length(Line > 71 then

When there was a #13 character at Buffer[71] then the new line was inserted
between the #13 and #10 characters. That leaded to #13#13#10#10 which is
prohibited for SMTP. So I fixed it:
if (Length(Line) > 71) and
not(Buffer[i] in [#10,#13]) then // JG 13.01.05
begin
NewLine;
end; //if Length(Line > 71 then

Now it's working fine for me. I don't know if this problem is fixed in Indy
10.
Regards
Johannes Geyer