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SendGrid "Link Branding" Custom SSL with Nginx
There’s this problem I ran into, and can’t figure out how to solve it.
I signed up for SendGrid and got my domain authorized/verified and also enabled “Link Branding”.
Now according to SendGrid, I added their CNAME(s) to my domain’s DNS manager.
url123.mydomain.com -> sendgrid.net.
url45678.mydomain.com -> sendgrid.net.
I am running a Node.js app which is now able to send mails through SendGrid and it runs flawlessly but I can’t open the links that are provided in the mail. (It shows the connection to this site is not secure, also the SSL certificate on that URL is not verified).
The server that I am using for this project won’t open any HTTP link, it redirects all HTTP traffic to HTTPS. (This can be a possible reason for the problem I’m facing).
Also, I tried to set CNAME(s) like:
url123.mydomain.com -> @ (pointing to A record for mydomain.com)
and then using Nginx to forward the url123 traffic to sendgrid.com, but that too wasn’t working because I already have a CNAME(www) pointing to @ (A record of mydomain.com).
P.S. Adding SSL is also not an option due to the above CNAME conflict.
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