IMAP and secure SMTP setup question

[Preguntalo]

So there seems that there would be one solution to two of my problems. I have
IMAP clients that are able to pull email from my exchange server. They are
not able to send email. This is a problem inside and outside the firewall.
From outlook express I’m getting a “The connection to the server has failed.
Account: 'Email', Server: 'outside.emailserver.com', Protocol: SMTP, Port:
587, Secure(SSL): Yes, Socket Error: 10061, Error Number: 0x800CCC0E” error.
(Basically connection refused right?) My client receive connector can
receive email from 0.0.0.0-255.255.255.255. I have these options checked:
TLS enabled, Basic Authentication, Offer Basic authentication only after
starting TLS and Integrated Windows authentication. This is also happening
to people that are using IPhones. (Which obviously uses IMAP and Secure
SMTP). What can I do to get these clients able to send email?
Thanks

[Preguntalo]

This is an exchange 2007 issue. I put it in the wrong group. Sorry about that

Post by Preguntalo
So there seems that there would be one solution to two of my problems. I have
IMAP clients that are able to pull email from my exchange server. They are
not able to send email. This is a problem inside and outside the firewall.
From outlook express I’m getting a “The connection to the server has failed.
587, Secure(SSL): Yes, Socket Error: 10061, Error Number: 0x800CCC0E” error.
(Basically connection refused right?) My client receive connector can
TLS enabled, Basic Authentication, Offer Basic authentication only after
starting TLS and Integrated Windows authentication. This is also happening
to people that are using IPhones. (Which obviously uses IMAP and Secure
SMTP). What can I do to get these clients able to send email?
Thanks