Can I enter in contact with a Muslim girl by internet for legal marriage? You help me for this.

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.

If the purpose of this contact is just in order to find out if she agrees to marry you, and then you will take her address and go to see her, and then if she agrees you will marry her, then this contact is permissible.

This could be done by just one contact, after this any further contact is like contacting any other marriageable woman.

Allaah Knows best.