Subj : Maybe Kees will know
To   : Joe Delahaye
From : Michiel van der Vlist
Date : Mon Sep 05 2016 21:48:35

Hello Joe,

On Monday September 05 2016 13:42, you wrote to All:

 JD> Bob Bashe is connecting with my system to exchange netmail.  Using the
 JD> lionsden.ddutch.nl domain, he connects but has password errors.  Using
 JD> the lionsdne.darktech.org domain, he connects normally, with no
 JD> password problems. Could this possibly be an ipv6 problem not going
 JD> back to ipv4 fast enough?  I can ping both from here, but the
 JD> ddutch.nl version comes back as ipv6, since both machines are using
 JD> that.

I can't rule it out, but I very much doubt this is IPv6 related. A delay can occur when a cleint thinks it has IPv6 andtries to make a connetction tio an IPv6 capable server and the connection fails because the client does not actually have an IPv6 connection.

But that would cause a timeout, not a password error. I suspect this is a configuration error on Bob's system, but without more infromation, we can only guess.

Kees' suggestion of forcing the mailer to make an IPv4 connection by adding -4 is a good suggestion to rule out an IPv6 related problem.


Cheers, Michiel

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