That is completely true and can be implemented easily to POP3 and IMAP4
the issue appears when the client try to use smtp ssl/tls and invoke the STARTTLS command. then the STunnel can not be used but only the mercury ssl/tls native mode with all the the actual constraints.
<SPAN id=result_box class=medium_text><SPAN style="BACKGROUND-COLOR: #fff" title="eso es completamente cierto y se puede aplicar sin problemas a pop3, imap4" kc="That is completely true and can be applied easily to POP3, IMAP4&#13;&#10;" jc="eso es completamente cierto y se puede aplicar sin problemas a pop3, imap4" closure_uid_dguknt="27"><FONT style="BACKGROUND-COLOR: #ebeff9" size=5>That is completely true and can be implemented easily to POP3 and IMAP4
the issue appears when the client try to use smtp ssl/tls and invoke the STARTTLS command. then the STunnel <SPAN id=result_box class=short_text><SPAN style="BACKGROUND-COLOR: #ebeff9" title="no se puede usar" kc="can not be used" jc="no se puede usar" closure_uid_dguknt="36">can not be used&nbsp;</SPAN></SPAN>but only the mercury ssl/tls native mode&nbsp;with all the the&nbsp;actual constraints.</FONT></SPAN><SPAN style="BACKGROUND-COLOR: #ebeff9" title="el problema ocurre al usar ssl/tls en smtp y el cliente invoca el comando starttls." kc="the problem occurs when using ssl / tls and client smtp invoke the STARTTLS command." jc="el problema ocurre al usar ssl/tls en smtp y el cliente invoca el comando starttls." closure_uid_dguknt="28"><SPAN id=result_box class=short_text><SPAN style="BACKGROUND-COLOR: #ebeff9" title="con las actuales limitaciones" kc="the existing constraints" jc="con las actuales limitaciones" closure_uid_dguknt="34"></SPAN></SPAN></SPAN></SPAN>