There is a 3 year statute of limitations on claims against a third party such as a alienation of affections claim so he would not have any recourse against the other man unless he filed an action a long time ago and has somehow managed to keep the case open.
As for your own safety, without having any contact with him for the past 6 years, it would be difficult for you to obtain a domestic violence protective order. You would also have to obtain service on him, alerting him to your presence in order to get one, so I don’t think that it is advisable to seek one preemptively.
Thank you for your quick reply!
Is he legally capable of doing anything else, for instance seeking alimony, causation, etc.?
If you are not yet divorced, then yes, he has the right to file a claim alimony or equitable distribution, but he may have a hard time proving that he is a dependent spouse under the statute if he hasn’t been receiving support for the past 6 years. If there is property to divide, it may be in your interest for a claim for equitable distribution to be filed.