Tag: sendgrid

  • sendgrid

    Sendgrid is a SMTP (Transactional Email Provider).

    https://sendgrid.com

    Sendgrid allow you to send email from your applications using SMTP or API.

    SASL authentication no mechanism available

  • Configure postfix to relay mails using SendGrid

    To use postfix to send email using sendgrid, you first you need to install postfix on your server. Edit main.cf

    vi  /etc/postfix/main.cf

    Find

    relayhost =

    Delete the line. Go to end of the file and add following

    smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_sasl_tls_security_options = noanonymous
smtp_tls_security_level = encrypt
header_size_limit = 4096000
relayhost = [smtp.sendgrid.net]:587

    Create API Key in SendGrid

    Next you need to create an API key in sendgrid. To do this, go to Settings > API Key.

    https://app.sendgrid.com/settings/api_keys

    SendGrid API key

    Click “Create API Key” button.

    Sendgrid create api key

    For this test, i just give the new API key Full Access. On next page you will get API key. Copy it and keep it safe as you won’t be seeing it again.

    sendgrid api key created

    Now you have the SendGrid.com API key, that you can use with postfix.

    Add API Key to postfix

    Edit file

    vi /etc/postfix/sasl_passwd

    Add

    [smtp.sendgrid.net]:587 apikey:YOUR_API_KEY_HERE

    Here is what i have

    root@honVm:~# cat /etc/postfix/sasl_passwd
    [smtp.sendgrid.net]:587 apikey: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
    root@honVm:~#

    Now run

    postmap /etc/postfix/sasl_passwd

    To test email, run

    postsuper -d ALL
systemctl restart postfix
> /var/log/mail.log
echo "Hello" | mail -s "test" [email protected]
tail -f /var/log/mail.log