minor #15115 [Mailer] Fix DSNs (OskarStark)

This PR was merged into the 4.4 branch. Discussion ---------- [Mailer] Fix DSNs Commits ------- 89a9964 Fix DSNs

Author: javiereguiluz

mailer.rst

@@ -150,8 +150,8 @@ party provider:
  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
+ Postmark postmark+smtp://ID@default  n/a postmark+api://KEY@default
+ Sendgrid sendgrid+smtp://KEY@default  n/a sendgrid+api://KEY@default
 ==================== ========================================== =========================================== ========================================
 
 .. caution::