The central problem is however, that dig gives me the correct MX record and nslookup doesn't. MX record exists, just exim is not able to find it.
I even tried this email id. It gives these prompts
...
dnslookup router called for sagaracharya@???
domain = tutanota.com
tutanota.com in "*"? yes (matched "*")
DNS lookup of tutanota.com (MX) gave TRY_AGAIN
...
How does exim find DNS? Which command does it particularly use? Are their specific ports that need to be forwarded for enabling this command?
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Sagar Acharya
https://designman.org