Re: SMTP relay error

["Karl O . Pinc" <kop meme com>]

On 2001.07.04 08:43 Ian Leonard wrote:
> Hello,
> 
> I have a machine running Balsa with not problems. A second machine (which
> is routed out via the first using ipfwd) has suddenly developed a
> problem.
> 
> When mail is sent a dialog box with the message "SMTP protocol error:
> cannot
> relay" pops up. 
> 
> The balsa version is 1.1.4. The smtp host is set to that of my ISP. It
> could be that the the ISP have changed their software to block relayed
> mail but I don't know enough about it to know.

You're probably right.  Try

telnet your.isps.smtp.host.com 25
EHLO yourmachine.com (make something up?)
MAIL FROM: you@youraddress
QUIT

If it gives you a error about relaying, the ISP is rejecting your mail.

See also: ftp://ftp.isi.edu/in-notes/rfc821.txt

Karl <kop@meme.com>