| Pos | Name | Country | stamps | Since |
|---|---|---|---|---|
| 299 | Molina Torres Ruben | España | 92 | 19/05/2011 |
| 647 | Molina María Gisella | Argentina | 2 | 04/10/2009 |
| 722 | Modernell Myriam | Uruguay | 3 | 04/09/2013 |
| 884 | Miron Claudia | España | 2 | 10/01/2011 |
| 878 | Mireles Jeniffer | México | 1 | 17/07/2015 |
| 865 | Miranda Blasco Manuel | España | 2 | 20/09/2012 |
| 509 | Miranda Jose | Italia | 9 | 17/03/2013 |
| 766 | Miranda Javier | Colombia | 1 | 29/06/2021 |
| 511 | Miraglia Magno | México | 9 | 02/08/2017 |
| 383 | Mira Maceiras Marcos | España | 19 | 20/02/2010 |
| 1011 | Mir Martí Jordi | España | 2 | 08/09/2015 |
| 55 | Minguez Francisco | España | 3409 | 05/05/2013 |
| 703 | Milosavljevic Dejan | Serbia y Montenegro | 3 | 20/02/2017 |
| 463 | Millán Cáceres Whidmer | Venezuela | 10 | 11/12/2017 |
| 244 | Miau Pelusa | Chile | 35 | 22/05/2011 |
| 225 | Meya Fernandez Marcel | España | 128 | 15/12/2011 |
| 609 | Metsan Alejando | España | 3 | 10/11/2013 |
| 561 | Mesén C. Juan Carlos | Costa Rica | 4 | 27/06/2010 |
| 507 | Merkouriadou Elena | Grecia | 14 | 29/01/2016 |
| 909 | Merino Sanderson Jonatan | España | 1 | 21/04/2017 |