Bit a noob when it comes to SSL certificates. I'm currently in the process of upgrading to PHP 5.6 though I use a SMTP to send my forums email which means with PHP 5.6 it has to validate the SSL certificate in order to actually send email our I'll get an error similar to the below. My question is, do I need a different SSL certificate to cover my sending address? "mail.veganforum.co.uk" it appears as though as my current only secures www.veganforum.co.uk and veganforum.co.uk but no sub-domains. Do I just need to purchase a new SSL certificate that supports sub-domains to get my forum sending email through SMTP using TLS again?