It's not zalgo. It's a online string decoder.
It's zalgo.
F̴̺͓̹̼̼̯͚̦̺̈͂͒ͮͮ̒͋̕ȏ̠͓̖͓̬͔͍̌̊́̇̊͢r̮͙̞̲̩̍ͩͨ̏͛̇͐͟͜ ̴̗̜̞̳̗̘̜͈̰̔̒̊̚͜͠e̷̠̼̣͔̪̞̗̰̝͋̑̚̕x̧̤̲̘̤̂̀̒͛ͮͮ̀̚a̵̠͙̩̭̓̈́̈́̊ͧ̿̽͟ḿ̢̗̠̲̜̺̳͚͌͞ͅp̧̲͎̝̐̇͐̏̔̃l̖̟̺̤̩̊͊́e̡̡̛̱̻͂̔̂,̳̭͙̘̮ͨ̑ͧ̌́ ̼̮̟̔ͩ͗ͭ̂͌ͅt̥̳̜̗̼̞̬͔̽͊̊̽͂̓̽̚͢h̻̫̺̰̹͙̺͕̋̄̒ͧ͒̿̒ͩ͐͢i̧̗̝͖̫̗͍̺̫̎ͬͦ̇ͨ͋ͪ͘s͛ͮ̐̔҉̴̥͙̖̯͟ ̵̯̠̟̠̫̠̣͍͊͌ͧ͞i̷͐ͮ͌̊̽͏̱̞͈̖͔̹͎̣ͅṡ̜̯͚͎̝͍̮̾̎͗̌̆ ̸̘͈͕̜̥ͪ͊̄̽̊a̛̹̱̙̬̳̪̦ͪl̫̤̰͕̬̻̏̾̓̌̆̓̑̓͠s̤̯̎͊ͦͪ̎̀́͠ȏ̷̱̰̋ͪ̒͘ ̈̽ͥ̑̆̾͐҉̵̩͡ͅŹ̻̠͙̬̹̇́͞ͅa̿͠͡҉̠̮ľ̨͍̇͝g̱͖̻͉̹͖̹̋ͪͭ̉͊̃ͮ̈́̓͝͡o̧͖͕̱̮̩̩̯̖̭ͬ̑͑͐͌.̶͍̦̯̈́̎͛̃̈́̀͘
But regardless of what it is, it's spam.