read the docs - ReadTheDocs activation email not deliverd -

i tried install readthedocs on linux server following documentation: http://read-the-docs.readthedocs.io/en/latest/install.html

however not receive activation email.
able see output of email on server

hello example.com!  you're receiving e-mail because or else has requested password user account @ example.com. can safely ignored if did not request password reset. click link below reset password.  http://xxxxx:8080/accounts/password/reset/key/xxxxxxxxxx/  in case forgot, username xxxxxxxxxxxx.  thank using example.com! example.com 

note: email password reset email, has same problem activation email. (i didn't receive email readthedocs installation)

there 2 things got attention.
1. read docs configure website name, change example.com th real website name.
2. sending adres no-reply@readthedocs.org, can change it? think part of issue.

here other headers of email

mime-version: 1.0 content-type: text/plain; charset="utf-8" content-transfer-encoding: 7bit subject: [example.com] password reset e-mail from: no-reply@readthedocs.org to: xxx@xxxxx.nl date: tue, 12 jul 2016 11:30:49 -0000 

so have 2 questions

• where can change content of email , things sender adres.

• what happend email (why won't receive it)