Merge pull request #1861 from sendgrid/mbernier-patch-8

Changed link to the v3 API

source/Classroom/Basics/Email_Infrastructure/smtp_ports.md

@@ -9,6 +9,10 @@ navigation:
   show: true
 ---
 
+{% info %}
+If your host will not allow any sort of SMTP connection, please try sending your email through our [v3 Mail API]({{root_url}}/API_Reference/Web_API_v3/Mail/index.html) instead of over SMTP.
+{% endinfo %}
+
 Many hosting providers and ISPs block port 25 as a default practice. When trying to connect to smtp.sendgrid.net remember that ports 25, 2525, 587, and 465 are all available for use.
 You can connect via unencrypted or TLS on ports 25, 2525, and 587. You can also connect via SSL on port 465. Keep in mind that many hosting providers and ISPs block port 25 as a default practice. If this is the case, contact your host/ISP to find out which ports are open for outgoing smtp relay.
 
@@ -20,4 +24,3 @@ Outbound connections for emails sent via SendGrid utilize opportunistic encrypti
 
 When sending through SendGrid's SMTP Relay, you can [add custom SMTP headers]({{root_url}}/API_Reference/SMTP_API/index.html) to control how your email is sent and what information is included.
 
-If your host will not allow any sort of SMTP connection, please try sending your email through our [Web API]({{root_url}}/API_Reference/Web_API/index.html) instead of over SMTP.