Tosafos (b bb 39b second from top: פירוש לאותו שאומר לפני ג׳ דבפרק יש בערכין מייתי עלה הא דא״ר יוסי מעולם לא אמרתי דבר וחזרתי לאחורי פי׳ שלא היה חושש אם ישמעו בעלים) explains a gemara (ibid 39a-b) "אָמַר רַבָּה בַּר רַב הוּנָא כֹּל מִילְּתָא דְּמִתְאַמְרָא בְּאַפֵּי תְּלָתָא לֵית בָּהּ מִשּׁוּם לִישָּׁנָא בִּישָׁא—Rabba bar Rav Huna says: Any matter that is said in the presence of three people is not subject to the prohibition of malicious speech, as it is already public knowledge" as meaning that if one says over negative information in a way that would naturally reach the ears of the person being spoken of (in front of 3 people, and certainly if the person is present) then it isn't considered lashon harah (which per this is only negative speech that one is chicken to have the person hear about).
R Yaakov Emden seems to hold of this lhalacha as his autobiography (megilas sefer) is chockful of attacks on various folks that he had issues with.
Is this the accepted halacha nowadays?