You can try sending international mail directly, but there are real practical hurdles that make it harder than it sounds. On your end, international postage and formatting requirements vary, and some facilities are strict about how incoming mail is processed and where it originates. On her end, the bigger problem is outgoing mail. Inmates typically have limited access to international postage, and many facilities simply do not make it easy to send letters outside the country. Letters headed overseas often get delayed, rejected, or never make it out at all.
InmateAid's Letters and Photos service solves both sides of that problem. You write your letter and send photos through the InmateAid app from wherever you are in the world. The mail is then printed and sent from InmateAid's facility in Florida or California, depending on where the inmate is located, which means it travels as domestic US mail. That makes it faster, more reliable, and far less likely to get caught up in mailroom complications.
When she writes back, she sends her letter to InmateAid's Florida address. InmateAid scans it into your account and you retrieve it for $1.49. No international mail delays, no lost letters, no postage headaches on either end.
For anyone outside the US trying to stay connected with someone inside, this is the most reliable setup available.