about some messages on my maillog

[César Augusto Seronni Filho <listas@kernelinformatica.com.br>]

Hi guys I am having some messages on my maillog that I want to know if those 
messages was a problem ok

first is that:
ipop3d[14378]: Command stream end of file while reading line user=username 
host=[external ip]

second is that:
May 13 09:11:34 server sendmail[14298]: NOQUEUE: [external ip] did not issue 
MAIL/EXPN/VRFY/ETRN during connection to MTA

what this realy means?

tks


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