Here's a method described how to test the available ciphers:
http://www.heise.de/forum/Mac-i/News-Kommentare/Verschluesselung-Apple-heuert-Kr ypto-Experten-zurueck/iOS-9-vollstaendige-CipherSuite-fuer-IMAP-gegen-OpenSSL-1- 0-1/posting-28680930/show/
By stripping iterally the ciphers from the suite you'll get this preference:
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (ECDHE-RSA-AES256-SHA)
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (ECDHE-RSA-AES128-SHA)
TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA (ECDHE-RSA-DES-CBC3-SHA)
TLS_DHE_RSA_WITH_AES_256_CBC_SHA (DHE-RSA-AES256-SHA)
TLS_DHE_RSA_WITH_AES_128_CBC_SHA (DHE-RSA-AES128-SHA)
TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA (EDH-RSA-DES-CBC3-SHA)
TLS_RSA_WITH_AES_256_CBC_SHA (AES256-SHA)
TLS_RSA_WITH_AES_128_CBC_SHA (AES128-SHA)
TLS_RSA_WITH_3DES_EDE_CBC_SHA (DES-CBC3-SHA)
TLS_ECDHE_RSA_WITH_RC4_128_SHA (ECDHE-RSA-RC4-SHA)
TLS_RSA_WITH_RC4_128_SHA (RC4-SHA)
TLS_RSA_WITH_RC4_128_MD5 (RC4-MD5)
But on TLS CLIENT HELLO there are actually more ciphers announced (here: iOS 6 Apple Mail):
# ./show-cipher-preference 993;echo $?
Version: TLSv1
Record Length: 173
Message Length: 169
Version: TLSv1
ServerRandom, Time: 1472654266,
Wed Aug 31 16:37:46 2016
(time reversed:) 3136013911,
c/loJan ?. /(:.':,+ 1970
Session ID Length: 0
Cipher Suite Length: 88
0x00 0xFF TLS_EMPTY_RENEGOTIATION_INFO_SCSV
0xC0 0x24 TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 (ECDHE-ECDSA-AES256-SHA384)
0xC0 0x23 TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 (ECDHE-ECDSA-AES128-SHA256)
0xC0 0x0A TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA (ECDHE-ECDSA-AES256-SHA)
0xC0 0x09 TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA (ECDHE-ECDSA-AES128-SHA)
0xC0 0x07 TLS_ECDHE_ECDSA_WITH_RC4_128_SHA (ECDHE-ECDSA-RC4-SHA)
0xC0 0x08 TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA (ECDHE-ECDSA-DES-CBC3-SHA)
0xC0 0x28 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 (ECDHE-RSA-AES256-SHA384)
0xC0 0x27 TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 (ECDHE-RSA-AES128-SHA256)
0xC0 0x14 TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (ECDHE-RSA-AES256-SHA)
0xC0 0x13 TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (ECDHE-RSA-AES128-SHA)
0xC0 0x11 TLS_ECDHE_RSA_WITH_RC4_128_SHA (ECDHE-RSA-RC4-SHA)
0xC0 0x12 TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA (ECDHE-RSA-DES-CBC3-SHA)
0xC0 0x26 TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
0xC0 0x25 TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
0xC0 0x2A TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
0xC0 0x29 TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
0xC0 0x04 TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
0xC0 0x05 TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
0xC0 0x02 TLS_ECDH_ECDSA_WITH_RC4_128_SHA
0xC0 0x03 TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
0xC0 0x0E TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
0xC0 0x0F TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
0xC0 0x0C TLS_ECDH_RSA_WITH_RC4_128_SHA
0xC0 0x0D TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
0x00 0x3D TLS_RSA_WITH_AES_256_CBC_SHA256 (AES256-SHA256)
0x00 0x3C TLS_RSA_WITH_AES_128_CBC_SHA256 (AES128-SHA256)
0x00 0x2F TLS_RSA_WITH_AES_128_CBC_SHA (AES128-SHA)
0x00 0x05 TLS_RSA_WITH_RC4_128_SHA (RC4-SHA)
0x00 0x04 TLS_RSA_WITH_RC4_128_MD5 (RC4-MD5)
0x00 0x35 TLS_RSA_WITH_AES_256_CBC_SHA (AES256-SHA)
0x00 0x0A TLS_RSA_WITH_3DES_EDE_CBC_SHA (DES-CBC3-SHA)
0x00 0x67 TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 (DHE-RSA-AES128-SHA256)
0x00 0x6B TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 (DHE-RSA-AES256-SHA256)
0x00 0x33 TLS_DHE_RSA_WITH_AES_128_CBC_SHA (DHE-RSA-AES128-SHA)
0x00 0x39 TLS_DHE_RSA_WITH_AES_256_CBC_SHA (DHE-RSA-AES256-SHA)
0x00 0x16 TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA (DHE-RSA-DES-CBC3-SHA EDH-RSA-DES-CBC3-SHA)
0xC0 0x06 TLS_ECDHE_ECDSA_WITH_NULL_SHA (ECDHE-ECDSA-NULL-SHA)
0xC0 0x10 TLS_ECDHE_RSA_WITH_NULL_SHA (ECDHE-RSA-NULL-SHA)
0xC0 0x01 TLS_ECDH_ECDSA_WITH_NULL_SHA
0xC0 0x0B TLS_ECDH_RSA_WITH_NULL_SHA
0x00 0x3B TLS_RSA_WITH_NULL_SHA256 (NULL-SHA256)
0x00 0x02 TLS_RSA_WITH_NULL_SHA (NULL-SHA)
0x00 0x01 TLS_RSA_WITH_NULL_MD5 (NULL-MD5)
Compression Methods Length: 1
Extensions Length: 40
Extension: 0x00 0x00, Extension Length: 18
Extension: 0x00 0x0A, Extension Length: 8, EC list: sect233k1 secp256r1 secp384r1 secp521r1
Extension: 0x00 0x0B, Extension Length: 2
0
It looks like the client (iOS Apple Mail) only announces TLS 1.2 ciphers but could only negotiate on TLS 1.0 ciphers with the server.