| Pos | Name | Country | stamps | Since |
|---|---|---|---|---|
| 294 | Mata Bruno | El Salvador | 35 | 10/04/2011 |
| 600 | Mataró Antoni | España | 3 | 27/07/2011 |
| 197 | Mate Bilonco | Argentina | 154 | 16/02/2012 |
| 593 | Mateos José Manuel | España | 5 | 18/06/2010 |
| 351 | Mau Manuel | España | 112 | 08/05/2012 |
| 931 | Medel MuÑoz Miguel Angel | Chile | 1 | 23/03/2014 |
| 12 | Medina Mauricio | Bolivia | 10395 | 01/10/2009 |
| 751 | Medina Jose | España | 27 | 21/01/2011 |
| 776 | Medina Carolina | España | 2 | 06/08/2016 |
| 990 | Medina Durango Miguel Ángel | España | 1 | 16/07/2015 |
| 69 | Melenuko Doctor | España | 1804 | 06/05/2014 |
| 960 | Mellado Daniel | Chile | 1 | 23/04/2012 |
| 463 | Melman Alejandro | España | 22 | 27/01/2019 |
| 634 | Méndez De Andés Herrero Román | España | 4 | 27/10/2013 |
| 23 | Menendez Francisco | España | 4276 | 02/06/2009 |
| 361 | Menendez Manuel | Estados Unidos de América | 23 | 23/05/2010 |
| 802 | Menéndez Yohan | Cuba | 2 | 30/03/2021 |
| 82 | Menendez Lara Manuel | España | 490 | 17/06/2009 |
| 727 | Meneses Nicolas | Perú | 2 | 22/08/2012 |
| 106 | Mergal Emilio | España | 475 | 03/08/2009 |