this post was submitted on 04 Jul 2023
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Lemmy Support

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New instance cannot send email via Gmail (self.lemmy_support)
submitted 1 year ago by HanSooloo to c/[email protected]
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Setup a self hosted instance and am using Gmail SMTP server with an app password. However, when I try to register a test user, I get an error indicating that "This server hasn't correctly set up email."

I used the Lemmy Easy Deploy project to set my system up. Following is the relevant section of the lemmy.hjson config file:

  email: {
    smtp_server: "smtp.gmail.com:587"
    smtp_login: "<user_name>@gmail.com"
    smtp_password: "my_super_secret_password"
    smtp_from_address: " <[email protected]>"
    tls_type: "tls"
  }

How can I find out why my Lemmy server thinks the email isn't setup properly?

How can I send email from my instance using a Gmail account I created for this purpose?

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[–] HanSooloo 1 points 1 year ago

A bit more progress as I am able to get connected to Gmail SMTP server via the openssl command inside the Lemmy container. Still wondering why I get the "This server hasn't correctly set up email" error.

lemmy@2ba1e7b7ab5b:/$ openssl s_client -connect smtp.gmail.com:587 -starttls smtp
CONNECTED(00000003)
depth=2 C = US, O = Google Trust Services LLC, CN = GTS Root R1
verify return:1
depth=1 C = US, O = Google Trust Services LLC, CN = GTS CA 1C3
verify return:1
depth=0 CN = smtp.gmail.com
verify return:1
***
Certificate chain
 0 s:CN = smtp.gmail.com
   i:C = US, O = Google Trust Services LLC, CN = GTS CA 1C3
 1 s:C = US, O = Google Trust Services LLC, CN = GTS CA 1C3
   i:C = US, O = Google Trust Services LLC, CN = GTS Root R1
 2 s:C = US, O = Google Trust Services LLC, CN = GTS Root R1
   i:C = BE, O = GlobalSign nv-sa, OU = Root CA, CN = GlobalSign Root CA
***
Server certificate
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
subject=CN = smtp.gmail.com

issuer=C = US, O = Google Trust Services LLC, CN = GTS CA 1C3

***
No client certificate CA names sent
Peer signing digest: SHA256
Peer signature type: ECDSA
Server Temp Key: X25519, 253 bits
***
SSL handshake has read 4579 bytes and written 419 bytes
Verification: OK
***
New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384
Server public key is 256 bit
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 0 (ok)
***
250 SMTPUTF8