>> I had the same problem until I changed my outgoing server authentication from "Choose automatically" to "SASL PLAIN." I have no idea why this was necessary.
Perhaps they "implemented" support for CRAM-MD5 authentication (the most secure method, which Aqua uses automatically if advertised by the server) -- and as is often the case, it actually does not work...
Just checked, yep, that's exactly what happened.
Verizon.net did the same last fall.
Wonder where they get enough brain-free monkeys to run those "mail services trusted by millions"...
And of course mail apps that don't support this -- most secure -- method of authentication just keep working (K9, Samsung Email, stock Android Email...)
