The key appears to be
useradd: no se puede bloquear /etc/passwd; inténtelo más tarde.
On failure to lock the file, it should wait, not fail.
** Changed in: postfix (Ubuntu)
Importance: Undecided = High
** Changed in: postfix (Ubuntu)
Status: New = Confirmed
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Sorry, didn't realize how old this was :) Marking invalid unless
someone can confirm that they've seen it again.
** Changed in: postfix (Ubuntu)
Status: Confirmed = Invalid
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adduser: `/usr/sbin/useradd -d /var/spool/postfix -g postfix -s
/bin/false -u 115 postfix' devolvió el código de error 1. Saliendo.
** Package changed: bsd-mailx (Ubuntu) = postfix (Ubuntu)
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: postfix (Ubuntu)
Status: New = Confirmed
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