+ /* RFC 5321 section 4.2: the text portion of the response may have only
+ HT, SP, Printable US-ASCII. Deal with awkward chars by cutting the
+ received message off before passing it onward. Newlines are ok; they
+ just become a multiline response (but wrapped in the error code we
+ produce). */
+
+ for (uschar * s = sx->buffer;
+ *s && s < sx->buffer + sizeof(sx->buffer);
+ s++)
+ {
+ uschar c = *s;
+ if (c != '\t' && c != '\n' && (c < ' ' || c > '~'))
+ {
+ if (s - sx->buffer < sizeof(sx->buffer) - 12)
+ memcpy(s, "(truncated)", 12);
+ else
+ *s = '\0';
+ break;
+ }
+ }