Update RST syntax of a table

Author: javiereguiluz

mailer.rst

@@ -144,14 +144,14 @@ This table shows the full list of available DSN formats for each third
 party provider:
 
 ==================== ========================================== =========================================== ========================================
- Provider             SMTP                                       HTTP                                        API
+Provider             SMTP                                       HTTP                                        API
 ==================== ========================================== =========================================== ========================================
- Amazon SES           ses+smtp://ACCESS_KEY:SECRET_KEY@default   ses+https://ACCESS_KEY:SECRET_KEY@default   ses+api://ACCESS_KEY:SECRET_KEY@default
- Google Gmail         gmail+smtp://USERNAME:PASSWORD@default     n/a                                         n/a
- Mailchimp Mandrill   mandrill+smtp://USERNAME:PASSWORD@default  mandrill+https://KEY@default                mandrill+api://KEY@default
- Mailgun              mailgun+smtp://USERNAME:PASSWORD@default   mailgun+https://KEY:DOMAIN@default          mailgun+api://KEY:DOMAIN@default
- Postmark             postmark+smtp://ID:ID@default              n/a                                         postmark+api://KEY@default
- Sendgrid             sendgrid+smtp://apikey:KEY@default         n/a                                         sendgrid+api://KEY@default
+Amazon SES           ses+smtp://ACCESS_KEY:SECRET_KEY@default   ses+https://ACCESS_KEY:SECRET_KEY@default   ses+api://ACCESS_KEY:SECRET_KEY@default
+Google Gmail         gmail+smtp://USERNAME:PASSWORD@default     n/a                                         n/a
+Mailchimp Mandrill   mandrill+smtp://USERNAME:PASSWORD@default  mandrill+https://KEY@default                mandrill+api://KEY@default
+Mailgun              mailgun+smtp://USERNAME:PASSWORD@default   mailgun+https://KEY:DOMAIN@default          mailgun+api://KEY:DOMAIN@default
+Postmark             postmark+smtp://ID:ID@default              n/a                                         postmark+api://KEY@default
+Sendgrid             sendgrid+smtp://apikey:KEY@default         n/a                                         sendgrid+api://KEY@default
 ==================== ========================================== =========================================== ========================================
 
 .. caution::