Paying into Pension Scheme whilst living abroad

I have a pension that was set up by an employer that I then left and can manage myself. I now live abroad and would like to keep paying into it but I am unsure if I am still allowed to. The pension provider isn't certain either as they "only manage the pension on behalf of HMRC". I read somewhere that I can pay up to £3,600 per year for the first 5 years after I leave the UK, is that the case? If so, what happens after 5 years, am I no longer allowed to pay in? I have no idea where I will be when I retire, I'm only 35 and haven't thought that far ahead.

Hi ,
 

As you have left the UK you have no relevant earnings for tax rleief to be applied on that basis. You are therefore limited to paying £3600 (gross) and only for 5 years after leaving. You cannot pay into the scheme after that . Thank you .