Autor: Dave C. Data: A: Nigel Metheringham CC: Oliver.Egginger, exim-users Assumpte: Re: [Exim] SMTP protocol violation: synchronization error (Exim4)
On 4 Jul 2002, Nigel Metheringham wrote:
> On Thu, 2002-07-04 at 12:40, Oliver Egginger wrote:
> > I have a perl-script which sends mail via the socket interface.
> > Previously (with Exim3) I had no problems with this script,
> > but with Exim4, when I first try to send mail,
> > Exim gives the following error:
> >
> > 12:52:38 SMTP protocol violation: synchronization error (next input sent too soon): rejected "DATA" H= ...
>
> Its part of ESMTP pipelining.
> DATA is a sync point - you need to make sure you have received the
> status returns for the MAIL FROM, (potentially multiple) RCPT TO and the
> DATA command itself, before you actually send the data on.
>
> I assume your script is ignoring the status returns entirely - probably
> not even reading them. From exim's point of view it is seeing
> additional stuff after the DATA command even though it has not send the
> status information back.
>
> Use one of the perl SMTP modules for doing this rather than rolling your
> own - you then get status checking back so you know when all the
> recipients were rejected (for example).
Another option would be to use the -bS interface.
> Nigel.
>
> --
> [ Nigel Metheringham Nigel.Metheringham@??? ]
> [ - Comments in this message are my own and not ITO opinion/policy - ]
