# \[SOLVED\] How letsencrypt works exactly?

**URL:** <https://community.letsencrypt.org/t/solved-how-letsencrypt-works-exactly/4043>\
**Category:** Help\
**Created:** [November 17, 2015, 8:17pm UTC](https://community.letsencrypt.org/t/solved-how-letsencrypt-works-exactly/4043 "2015-11-17T20:17:10Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![pfg](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/pfg/32/1924_2.png) [@pfg](https://community.letsencrypt.org/u/pfg)\
**Post date:** [November 18, 2015, 9:02am UTC](https://community.letsencrypt.org/t/solved-how-letsencrypt-works-exactly/4043/5 "2015-11-18T09:02:32Z")

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If you’re willing to spin up a web server on your smtp server during renewal (i.e. every few months), that’s possible. Understandably that’s not always an option for various reasons.

In the future, Let’s Encrypt [will support DNS-based challenges](https://community.letsencrypt.org/t/shouldnt-verification-via-dns-record-be-a-priority/604/15?u=pfg), which should make this a whole lot easier.

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