SendGrid is cloud-based solution sends transactional and marketing emails instead of our email infrastructure.
How to use SendGrid for delivery emails to your customers.
We will use Postfix
1. Install postfix and client for console
Go to console and install postfix:
$sudo apt-get update
$sudo apt-get install mailutils
it will install few necessary packages
When ask you what configuration do you need, just select Num 5 - Local Only.
Please select the mail server configuration type that best meets your needs.
Should be chosen to leave the current configuration unchanged.
Mail is sent and received directly using SMTP.
Internet with smarthost:
Mail is received directly using SMTP or by running a utility such
as fetchmail. Outgoing mail is sent using a smarthost.
All mail is sent to another machine, called a 'smarthost', for delivery.
The only delivered mail is the mail for local users. There is no network.
1. No configuration 2. Internet Site 3. Internet with smarthost 4. Satellite system 5. Local only
General type of mail configuration:
select 5 , we will modify postfix config file later
2. Getting API Key
Goto sendgrid.com, login and goto Settings - > API Keys.
We need generate API Key for our host
Push Button "Create API Key"
Select "Restricted Access" - we need just send mails
Email Send - move bar to right
Api key will show ones and will not show again, just keep key in clipboard or to some safe place.
Click "Done" and go to terminal.
We need create file
- use 'apikey' as your username
- use your password as your API from previos step
[smtp.sendgrid.net]:587 apikey:ssdfsejsoudfs<fake apikey>7f98s7d9f8s6d9fsd
Note, put your correct api key
3. Configure Postfix
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 relayhost = [smtp.sendgrid.net]:587
modify permission of this file, need access only for root and update postfix hashtable to use this file
$ sudo chmod 600 /etc/postfix/sasl_passwd $ sudo postmap /etc/postfix/sasl_passwd
and restart postfix:
$ sudo systemctl restart postfix
Check send email to real recipient address:
$mail -s 'test message' <your email>@gmail.com
Push Ctrl+D to send message.
Dec 3 11:00:47 web1 postfix/qmgr: CD5C41AA039F: from=<[email protected] server.com>, size=379, nrcpt=1 (queue active)
Dec 3 11:00:47 web1 postfix/smtp: CD5C41AA039F: to=<anyour [email protected]>, relay=smtp.sendgrid.net[188.8.131.52]:587, delay=0.1, delays=0.01/0.01/0.07/0.01, dsn=2.0.0, status=sent (250 Ok: queued as hus4UVF-QkqTM8e26rf0mw)
Dec 3 11:00:47 web1 postfix/qmgr: CD5C41AA039F: removed
Now your server/Web App can send any notifications to your customers through SendGrid
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