SEND, SAML, SOML, VRFY: Used or Not?

I have a question that is more 821 than 822:

How commonly used and supported are the SMTP commands SEND, SAML, SOML,
and VRFY?  Is there much benefit to ensuring that an SMTP server supports
them?

|Randall Gellens             |                    
randy(_at_)mv(_dot_)unisys(_dot_)com|
|(714) 380-6350              | fax (714)597-8053 can add ,,,,,,,,6350|
|Mail Stop MV 237            |                        Net**2 656-6350|
|Opinions are personal;  facts are suspect;   I speak only for myself|