Jabber servers are starting to migrate toward newer ciphers and are restricting usage of old ones.
This results in miranda not being able to login into plentiful of them.
None of these ciphers seem to be supported by miranda at the current given time:
Spoiler
ECDHE-RSA-AES256-SHA384 (0xc028)
ECDHE-RSA-AES256-SHA (0xc014)
DHE-RSA-AES256-SHA256 (0x6b)
DHE-RSA-AES256-SHA (0x39)
AES256-SHA256 (0x3d)
AES256-SHA (0x35)
ECDHE-RSA-AES128-SHA256 (0xc027)
ECDHE-RSA-AES128-SHA (0xc013)
DHE-RSA-AES128-SHA256 (0x67)
DHE-RSA-AES128-SHA (0x33)
AES128-SHA256 (0x3c)
AES128-SHA (0x2f)
https://www.openssl.org/docs/apps/ciphers.html#tls_v1_2_cipher_suites
Please take care of it!