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On Wed, 01 Jul 2009 09:15:09 +0100, Simon Waters <simon@xxxxxxxxxxxxxx> wrote: > grant@xxxxxxxxxxxx wrote: >> >> I'm not sure what's happened here, and I'm struggling to find >> anything relevant in the logs, but this morning I am getting SMTP 451 >> errors: "451 Temporary local problem - please try later" Well, I >> tried again later. And again. And again. Still getting the same >> issues. >> >> Curiously I can send mail successfully with the "mail" command, but >> telnetting to the SMTP service and going through things that way >> consistently produces these 451 errors. >> >> I have tried stopping and restarting the SMTP service to no avail. > > Some sort of temporary local problem ;) > > Possibly a problem with the DNS if you have some sort of check on > connecting boxes. > > Show us the logs produced. > > Are you sending, or delivering email to this server? Both, actually, but it seems to be the sending that's failing. The machine retrieves mail from a remote POP machine for each user (ie me) and stores it in a local Maildir, then served up by IMAP. It accepts incoming connections on :25 for outgoing mail. I would include the logs but can't for the life of me find them! I know that sounds silly, but when checking all the logs' timestamps immediately after I get the 451 error, none of them seem to be any newer. Not /var/log/mail* or /var/log/exim4/*. WRT DNS issues - essentially there are no connecting boxes. Almost without exception the only machine I use to send email through this machine is my laptop, and even then I do so with SSH port forwarding - I have laptop:25 forwarded to server:25, so as far as Exim should be concerned, it is receiving SMTP traffic from itself. As I said above, curiously the mail command will send fine. (I'm sending this via my Roundcube webmail interface which uses PHPMAIL, so I'd expect it to work OK). Any thoughts? -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html