felipe@voyager:~$ telnet mail.biotoscana.com 25
Trying 200.75.54.76...

Connected to mail.biotoscana.com.
Escape character is '^]'.
220 mail.biotoscana.com
ehlo lab1
250-mail.biotoscana.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250 8BITMIME
AUTH PLAIN AGZlbGlwZWJpb3NlckBmdW5kYWNpb25iaW9zZXIuY29tLmNvADEyMw==
235 Authentication successful
mail from:<felipbioser@fundacionbioser.com.co>
250 Ok
rcpt to:<felipe.ceballos@gmail.com>
554 <felipe.ceballos@gmail.com>: Relay access denied