| Pos | Name | Country | stamps | Since |
|---|---|---|---|---|
| 298 | Molina Torres Ruben | España | 92 | 19/05/2011 |
| 650 | Molina María Gisella | Argentina | 2 | 04/10/2009 |
| 725 | Modernell Myriam | Uruguay | 3 | 04/09/2013 |
| 890 | Miron Claudia | España | 2 | 10/01/2011 |
| 874 | Mireles Jeniffer | México | 1 | 17/07/2015 |
| 869 | Miranda Blasco Manuel | España | 2 | 20/09/2012 |
| 508 | Miranda Jose | Italia | 9 | 17/03/2013 |
| 736 | Miranda Javier | Colombia | 1 | 29/06/2021 |
| 510 | Miraglia Magno | México | 9 | 02/08/2017 |
| 384 | Mira Maceiras Marcos | España | 19 | 20/02/2010 |
| 1011 | Mir Martí Jordi | España | 2 | 08/09/2015 |
| 53 | Minguez Francisco | España | 3409 | 05/05/2013 |
| 698 | Milosavljevic Dejan | Serbia y Montenegro | 3 | 20/02/2017 |
| 464 | Millán Cáceres Whidmer | Venezuela | 10 | 11/12/2017 |
| 248 | Miau Pelusa | Chile | 35 | 22/05/2011 |
| 225 | Meya Fernandez Marcel | España | 128 | 15/12/2011 |
| 614 | Metsan Alejando | España | 3 | 10/11/2013 |
| 567 | Mesén C. Juan Carlos | Costa Rica | 4 | 27/06/2010 |
| 506 | Merkouriadou Elena | Grecia | 14 | 29/01/2016 |
| 908 | Merino Sanderson Jonatan | España | 1 | 21/04/2017 |