Yes. The current hosting I am using is with a simple case:

mail.riseup.net
smtp.riseup.net

Both works via SSL.

If the hosts are:

mail.foo.com
smtp.bar.com

That is a more complicated case.
Where SNI is maybe required.


Thanks Victor.

On 2024-08-17 13:59, Viktor Dukhovni via Postfix-users wrote:
On Sat, Aug 17, 2024 at 11:05:43AM +0800, Wesley via Postfix-users wrote:

That’s great. I will look into SNI for postfix.

Sure, but do first consider a single certificate with multiple SANs, if
at all possible.  Particulary for simple use cases, like the one you're
looking at: "smtp.example.org" plus "mail.example.org".

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