Negotiation failed with Ipad after upgrade

[Johan Hattne]

> On Jun 13, 2017, at 15:42, Paul van der Vlis <paul at vandervlis.nl> wrote:
> 
> Hello,
> 
> I have upgraded a server from version 2.4.17 to 2.5.10 (Debian
> packages), and now an Ipad does not work anymore. The error is something
> like:
> 
> Jun 13 21:18:18 hostname cyrus/imap[10664]: STARTTLS negotiation failed:
> host.domain.nl [1.2.3.4]
> 
> No problem with Thunderbird and Android devices, they work fine.
> 
> I've also tested imaps, but the same problem there.
> 
> In imapd.conf I have this setting:
> tls_ciphers: TLSv1.2:+TLSv1:+HIGH:!aNULL:@STRENGTH
> 
> In the old version I had this setting:
> tls_cipher_list: TLSv1+HIGH:!aNULL:@STRENGTH
> 
> What will be wrong?

Could it be this?

  https://github.com/cyrusimap/cyrus-imapd/issues/1872

I saw that predominately from Apple portable devices with the Debian testing packages.

// Johan