css.gg/icons/css/mail-open.css

700+ Pure CSS, SVG & Figma UI Icons Available in SVG Sprite, styled-components, Black & White PNG, NPM & API + 6031 glyphs

.gg-mail-open,
.gg-mail-open::after {
    display: block;
    box-sizing: border-box;
    height: 14px;
    border: 2px solid
}

.gg-mail-open {
    border-top: 0;
    transform: scale(var(--ggs,1));
    position: relative;
    width: 18px;
    border-radius: 2px
}

.gg-mail-open::after {
    content: "";
    position: absolute;
    border-radius: 3px;
    width: 14px;
    transform: rotate(-45deg);
    bottom: 3px;
    left: 0
}