# Error sending email

**URL:** <https://community.auth0.com/t/error-sending-email/44096>\
**Category:** Get Help\
**Tags:** emails, auth0, lock\
**Created:** [June 4, 2020, 7:35am UTC](https://community.auth0.com/t/error-sending-email/44096 "2020-06-04T07:35:24Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![smaniottogms](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/smaniottogms/32/13132_2.png) [@smaniottogms](https://community.auth0.com/u/smaniottogms)\
**Post date:** [June 4, 2020, 7:35am UTC](https://community.auth0.com/t/error-sending-email/44096/1 "2020-06-04T07:35:25Z")

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When i use my custom SMTP to send email, this error appears in the logs:

“error”: “139692619818880:error:141A318A:SSL routines:tls\_process\_ske\_dhe:dh key too small:../deps/openssl/openssl/ssl/statem/statem\_clnt.c:2150:\n”

How do i fix this error?

Thanks

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<div class="post-metadata">

**Author:** ![dan.woda](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/dan.woda/32/18340_2.png) [@dan.woda](https://community.auth0.com/u/dan.woda)\
**Post date:** [June 8, 2020, 9:34pm UTC](https://community.auth0.com/t/error-sending-email/44096/3 "2020-06-08T21:34:39Z")

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> [@smaniottogms](#):
>
> routines:tls\_process\_ske\_dhe:dh key too small

This appears to be related to your email server, not specifically an Auth0 error. I found this which may or may not provide some insight:

> <https://stackoverflow.com/questions/30701397/ssl-operation-failed-with-code-1-dh-key-too-small>

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<div class="post-metadata">

**Author:** ![dan.woda](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/dan.woda/32/18340_2.png) [@dan.woda](https://community.auth0.com/u/dan.woda)\
**Post date:** [June 23, 2020, 1:34am UTC](https://community.auth0.com/t/error-sending-email/44096/4 "2020-06-23T01:34:41Z")

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