> On 23/05/2025 18:01 EEST Damian via dovecot <dovecot@dovecot.org> wrote:
> 
>  
> On 2025-05-23 12:57, Aki Tuomi via dovecot wrote:
> > 
> > It should work if you send cn, that should be supported. Are you sure you 
> > are sending SNI in your testing? e.g. with openssl you need to use 
> > -servername foobar to actually send SNI.
> > 
> > Aki
> 
> Thanks. Yeah I am sure. I am filtering by SNI on haproxy. My mail client 
> is properly using SNI in TLS. Just confirmed it with wireshark:
> 
> Extension: server_name (len=17)
>      Type: server_name (0)
>      Length: 17
>      Server Name Indication extension
>          Server Name list length: 15
>          Server Name Type: host_name (0)
>          Server Name length: 12
>          Server Name: secret
> 
> Also on server I see PROXY V2 packets. I set haproxy to send authority 
> TLV (which contains SNI value used by client) and it seems dovecot still 
> does not make use of it.
> 
> TLV: (t=2,l=12) AUTHORITY
>      Type: AUTHORITY (0x02)
>      Length: 12
>      Value: secret
> 
> 
> So it seems it is not supported by dovecot or it is a bug. What you 
> think? Could you confirm that TLV AUTHORITY is supported by dovecot and 
> this should work for sure? If this is a bug where should I report it?
> 
> DK

Hi!

It should work, I'll open a ticket about this.

Aki

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