WHMCS offers advanced settings for the configuration of the mail provider. You have the possibility to choose from a list of providers: PHP Mail (default one), SMTP, Mailgun, SendGrid and SparkPost.
To configure the WHMCS Mail Provider follow the steps:
1. Log in to the WHMCS admin area
2. Go to System Settings >> General Settings
3. Choose the Mail tab and click the Configure Mail Provider button. A popup box will open.
4. Choose the Mail Provider, enter the details for it and click the Save button.
Mail provider 1: PHP Mail
This option will use the PHP mail() function. The only option available here is Mail Encoding.
Mail provider 2: SMTP
This will probably be the most used mail provider by users. There are many SMTP options that can be configured here:
| Mail Encoding | the email encoding that will be used – 7bit, 8bit, binary, base64, quoted-printable |
| Service Provider | generic or Google. |
| SMTP Host | the SMTP mail server. Usually, this is mail.yourdomain.com |
| SMTP Port | the SMTP port. By default, this is 465 or 587. On most servers, both ports will be open. |
| SMTP Authentication | password or Oauth2. OAuth is an open standard for access to applications/websites. |
| SMTP Username | the SMTP account username. In most cases, it will be the email address. |
| SMTP Password | the SMTP account password (if you chose the ‘password’ SMTP authentication method) |
| SMTP SSL Type | SSL or TLS. Transport Layer Security (TLS) is the successor of SSL (Secure Sockets Layer) |
| SMTP Debug | this will enable debug logging for SMTP operations |
Mail provider 3: Mailgun
Mailgun – mailgun.com – is an email service delivery. Options here are:
| Mailgun Region | You can select the EU or US region |
| Sending Domain | domain sending the emails |
| Mailgun Private API Key | your API key – can be found in your Mailgun account |
Mail provider 4: SendGrid
SendGrid – sendgrid.com – is another email delivery service. With the Free account, you can send 100email/day. The only option that WHMCS needs is the SendGrid API Key.
Mail provider 4: SparkPost
SparkPost – sparkpost.com – is another email sending platform. The free/test SparkPost account also has 100emails/day. The WHMCS options are:
| SparkPost Account | SparkPost (by default) or SparkPost EU |
| SparkPost API Key | your SparkPost API key |
| Use Sink Testing | read more about this option here https://support.sparkpost.com/docs/faq/using-sink-server |
Related articles:
How to configure Mail Settings in WHMCS