Am 23.07.2014 11:51, schrieb Pau Peris:
> while trying to send emails to the following address 
> [email protected] <mailto:[email protected]> i
> always get the following error message. Could any one tell where can i look 
> in order to find what's going wrong?

first: don't post HTML - see the mess in the quote below

> Jul 23 11:42:29 we postfix/smtp[30874]: 6B9D64563A: to=<[email protected] 
> <mailto:[email protected]>>,
> relay=mail.jazztel.es <http://mail.jazztel.es>[62.14.3.193]:25, delay=7.3, 
> delays=0.03/0/5.1/2.2, dsn=4.0.0,
> status=deferred (host mail.jazztel.es <http://mail.jazztel.es>[62.14.3.193] 
> said: 421 Unexpected failure, please
> try later (in reply to end of DATA command))

"mail.jazztel.es" responded with a temporary error and so your postfix
would try again later, we don't know what "Unexpected failure" could
mean because we are not "jazztel.es"

> This is the bounce email it generates

Will-Retry-Until: Sun, 27 Jul 2014 08:53:45 +0200 (CEST)

so why in the world did you enable notify about deferred mail?
that's not default behavior - that case above normally just
don't bother you because it is retried for 5 days, most likely
delivered later and only if it fails finally bounced local

however, follow the welcome message and provide "postconf -n"

> <[email protected] <mailto:[email protected]>>: host mail.jazztel.es 
> <http://mail.jazztel.es>[62.14.3.193]
> said: 421 Unexpected
>     failure, please try later (in reply to end of DATA command)
> 
> Final-Recipient: rfc822; [email protected] <mailto:[email protected]>
> Original-Recipient: rfc822;[email protected] 
> <mailto:rfc822%[email protected]>
> Action: delayed
> Status: 4.0.0
> Remote-MTA: dns; mail.jazztel.es <http://mail.jazztel.es>
> Diagnostic-Code: smtp; 421 Unexpected failure, please try later
> Will-Retry-Until: Sun, 27 Jul 2014 08:53:45 +0200 (CEST)

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