Here is the list of border gates that allowed foreigners enter and exit Vietnam by E-visa.
13 international airports: Noi Bai (Ha Noi), Tan Son Nhat (Ho Chi Minh City), Cam Ranh (Khanh Hoa), Da Nang, Cat Bi (Hai Phong), Can Tho, Phu Quoc (Kien Giang), Phu Bai (Thua Thien Hue), Van Don (Quang Ninh), Tho Xuan (Thanh Hoa), Dong Hoi (Quang Binh), Phu Cat (Binh Dinh), Lien Khuong (Lam Dong).
16 land border gates: Tay Trang (Dien Bien), Mong Cai (Quang Ninh), Huu Nghi (Lang Son), Lao Cai, Na Meo (Thanh Hoa), Nam Can (Nghe An), Cau Treo (Ha Tinh), Cha Lo (Quang Binh), La Lay and Lao Bao (Quang Tri), Bo Y (Kon Tum), Moc Bai and Xa Mat (Tay Ninh), Tinh Bien and Vinh Xuong (An Giang), Ha Tien (Kien Giang).
13 sea border gates: Hon Gai and Cam Pha (Quang Ninh), Hai Phong, Nghi Son (Thanh Hoa), Vung Ang (Ha Tinh), Chan May (Thua Thien Hue), Da Nang, Nha Trang (Khanh Hoa), Quy Nhon (Binh Dinh), Dung Quat (Quang Ngai), Vung Tau (Ba Ria – Vung Tau), Ho Chi Minh City, Duong Dong (Kien Giang).
Simply apply online for your tourist E-visa. You will receive your code by email to print your visa or access via official website of the Vietnam Immigration Department