In case you logged in your DMarket account from a different IP address, you could be asked to confirm it via e-mail.
- Check your e-mail box in order to find login confirmation e-mail there (Fig.1)
FIGURE 1
- Press "Confirm IP address" button in the conformation e-mail you received (Fig. 2)
FIGURE 2
After your IP is confirmed you will able to access your DMarket account.