hey Maikel,
which version of Delta Chat are you using???
with the latest Android version(0.510.1) you don't need to do anything special, just
set email and password and wait some seconds,
if you are using iOS or Desktop this may not work, you could try what Marco said and
additionally set both security (IMAP and SMTP) to off, if that doesn't work, a final
workaround if you are using a platform other than Android, is to ask a friend or familiar
to let you configure Delta Chat in their device, then go to Delta Chat settings, in Chats
and media, at the bottom there is an option to create a backup, then import that backup in
your device (and don't forget to delete your account and backup from the friend is
device)
if you still are struggled don't hesitate to contact me directly:
adbenitez(a)nauta.cu I speak Spanish so it may be easier for you to explain your issue
--
Mi blog:
http://adbenitez.cubava.cu
Creador de SimpleBot, un robot para Delta Chat, escrÃbele a: adb_bot1(a)testrun.org