Um, no, that is not what Paul was telling the Thessalonians. He was telling them to not be led astray by a false letter supposedly from him but not his writing. He even started putting his hand to the closings despite his failing eyesight, so the readers of his letters would know it was from him, hopefully.
That is false and misleading response. Try reading the passage in Second Thessalonians again. The Apostle Paul warned them for a specific reason and told them not to listen to the teaching that the "day of Christ" is at hand. The apostasy must come first and the antiChrist must be revealed first. So, no rapture for you, you will just have to persevere. Now we beseech you, brethren, by the coming of our Lord Jesus Christ, and by our gathering together unto him, That ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand. Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;
Second Thessalonians, Catholic chapter two, Protestant verses one to three,
as authorized, but not authored, by King James