Dewain Riddle wrote:
one of my users can't recieve email from one of his friends.  his friend's
email is getting bounce back, with the message:

571 sorry, sender address has invalid format (#5.7.1 - chkuser)

is the friend's email not configured right?  from what i've researched,
this may be the case.  two questions:

1.  can i disable this chkuser function so the friends email will go through?

2.  is this something that i would want to do, or would there be
undesirable results?

His friend's email may be sending invalid CR/LF's. I read somewhere about people that had this problem. You COULD turn off chkuser for his friend; you would need his IP address, and create an entry in tcp.smtp for his friend. By reading a little, it may be that his friend has a null char in his email or return path (a plus sign or a slash, or something similar).


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