I'm using my own SMTP server with SMTP AUTH for sending mails. The greeting looks like:
250-[...fqdn...] Hello [...fqdn...] [...ip...], pleased to meet you
250-AUTH CRAM-MD5 DIGEST-MD5
Unfortunately when configuring user name and password for SMTP (no TLS), Android 4.2 (the standard mail app of the Google/LG Nexus 4) does not seem to expect this:
authentication methods aren't supported by server.
On the server, I see Android disconnecting after that greeting was sent.
What authentication methods are actually supported by Nexus 4's mail app?