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Excellent, Thank you ...<br />

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<div class="content wysiwyg-content">
 <br />
&nbsp;I can contact my host and send/recive e-mails just fine. The only problem I find is the e-mail addresses.<br />
&nbsp;Here it is:<br />
<br />
&nbsp;telnet localhost 25<br />
&nbsp;welcome etc. Sendmail 8.8.8 etc.<br />
&nbsp;EXPN, or VRFY root<br />
&nbsp;250 - Administrator&lt;root@localho<wbr />st&gt;<br />
<br />
&nbsp;How can I disable EXPN and VRFY in sendmail. On my ISP they have done another trick(NOT DISABLING) that when you issue:<br />
<br />
&nbsp;VRFY root<br />
&nbsp;250 - root@ISP.com<br />
&nbsp;VFRY(or EXPN) user_that_does_not_exist<br />
&nbsp;250 - user_that_does_not_exist@I<wbr />SP.com<br />
&nbsp;<br />
&nbsp;I like this second trick much better ... any help, suggestions??<br />
&nbsp;<br />
&nbsp;Thanks,<br />
&nbsp;
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</div>


 
 I can contact my host and send/recive e-mails just fine. The only problem I find is the e-mail addresses.
 Here it is:

 telnet localhost 25
 welcome etc. Sendmail 8.8.8 etc.
 EXPN, or VRFY root
 250 - Administrator<root@localhost>

 How can I disable EXPN and VRFY in sendmail. On my ISP they have done another trick(NOT DISABLING) that when you issue:

 VRFY root
 250 - root@ISP.com
 VFRY(or EXPN) user_that_does_not_exist
 250 - user_that_does_not_exist@ISP.com
 
 I like this second trick much better ... any help, suggestions??
 
 Thanks,
 

Sendmail features ...

The variety of Linux distributions creates myriad issues relating to configuration and operations when computers are networked, not the least of which is the use of various network management applications, some of which are included with specific distributions, while others are standalone applications.