envelope

<svg fill="currentColor" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg"><path d="M48 64c-26.5 0-48 21.5-48 48 0 15.1 7.1 29.3 19.2 38.4l208 156c17.1 12.8 40.5 12.8 57.6 0l208-156c12.1-9.1 19.2-23.3 19.2-38.4 0-26.5-21.5-48-48-48L48 64zM0 196L0 384c0 35.3 28.7 64 64 64l384 0c35.3 0 64-28.7 64-64l0-188-198.4 148.8c-34.1 25.6-81.1 25.6-115.2 0L0 196z"/></svg>

<i class="ti ti-envelope"></i>

ti ti-envelope

<i class="ti ti-009690"></i>

ti ti-009690

<svg aria-hidden="true" focusable="false" fill="currentColor" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg"><path d="M48 64c-26.5 0-48 21.5-48 48 0 15.1 7.1 29.3 19.2 38.4l208 156c17.1 12.8 40.5 12.8 57.6 0l208-156c12.1-9.1 19.2-23.3 19.2-38.4 0-26.5-21.5-48-48-48L48 64zM0 196L0 384c0 35.3 28.7 64 64 64l384 0c35.3 0 64-28.7 64-64l0-188-198.4 148.8c-34.1 25.6-81.1 25.6-115.2 0L0 196z"/></svg>

<svg aria-hidden="true" focusable="false" fill="currentColor" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg"><path d="M48 64c-26.5 0-48 21.5-48 48 0 15.1 7.1 29.3 19.2 38.4l208 156c17.1 12.8 40.5 12.8 57.6 0l208-156c12.1-9.1 19.2-23.3 19.2-38.4 0-26.5-21.5-48-48-48L48 64zM0 196L0 384c0 35.3 28.7 64 64 64l384 0c35.3 0 64-28.7 64-64l0-188-198.4 148.8c-34.1 25.6-81.1 25.6-115.2 0L0 196z"/></svg>

https://cdn.jsdelivr.net/npm/@ticnob/icons@1/icons/envelope.svg