You could send an e-card.

你可以邮寄电子贺卡。

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Send an e-card: If snail mail is too slow for you, you can send romantic e-cards instantly.

电子贺卡：如果你觉得寄信太慢了，你可以发送一封浪漫的电子贺卡来代替。

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Loving children and husbands buy Spaces, then add videos, photos, and love notes, and send an e-Card to Mom.

可爱的孩子们和丈夫们购买空间，将视频、照片和爱的箴言加到空间里，并给母亲发送电子卡。

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People were far less likely to send an e-card to their boyfriends or girlfriends, perhaps because they were too busy buying them chocolate bacon cookies and roses.

CNN: Bacon chocolate, e-cards and other Valentine trends

He says that 20% of the people who get that card send him an e-mail.

FORBES