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Internet Related/Filtering/Firewall Thread, Bare Linefeed problems on email server in Technical; Hi folks, Running a Zimbra setup for our email (internal and external) which appears to work wonders with exception to ...
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    synaesthesia's Avatar
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    Bare Linefeed problems on email server

    Hi folks,

    Running a Zimbra setup for our email (internal and external) which appears to work wonders with exception to a few email addresses. Our provider (EMBC) is adament it's a problem with our system and have told us it's to do with "Bare Linefeeds" in our mail headers which violate this and that. However these problems didn't start until EMBC "upgraded" the email system their end to MailMarshal (and still haven't given us any control over it - shakes fist!!)

    Anyway, is anyone aware of a way we can test for these "Bare Linefeeds"? And any way of fixing this issue if it even exists? (We are nearly 100% sure it's nothing to do with Zimbra! - there's no problem sending mail to the other god knows how many addresses on our system!)

    For reference we're being pointed to http://cr.yp.to/docs/smtplf.html

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    GrumbleDook's Avatar
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    Bare Linefeed is a pretty rare issue nowadays and RFC2821 talks about this a bit more (as well as the above reference you have put in).

    If you are not getting the same issue when sending the same email to other mail accounts on different servers then it might be a problem with the receiving server. Since the desk has sent test emails that have gotten through fine it might be worth seeing if there is another Zimbra box on EMBC that can send test emails to the same address you are trying to see what they get?

    Most decent mail systems will not allow bare linefeeds so I would be surprised if this hadn't hit before or with other email addresses you are sending to.

    As for access to MailMarshall ... it is being pushed for but whilst the desk is tweaking the logic on the rules then they are asking if you can go through them for it. Moving from Webroot to MailMarshall hasn't been easy and it was a forced move due to Webroot pulling the plug on locally hosted appliances, trying to force folk to go for their cloud service which would have broken other things!

    There should have been an email sent out from EMBC to noted technical contacts today about the changes over the summer (if you don't get these and you want them then email embc@embc.org.uk to request to be put not he mailing list).

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    synaesthesia's Avatar
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    Joy joy joy - I remember you talking about the MailMarshal bit but was rather hoping that would be sorted before return! We do tend to have to release a fair amount of "stuck" or quarantined emails and of course check for abuse and what not, hence our slight impatience there. No worries, needs must!

    It could well be the recipients but it's always awkward when people are trying to point fingers when noone is entirely in the know. Dont know of any other Zimbra users to hand which makes me think it could well be an issue therein.
    This is another area where having the access we had to Webroot helped- it was a handy reference point for stuck emails or return/failure information we don't otherwise receive.

    Cheers for the input though - much obliged. I'd certainly be surprised if Zimbra failed to meet particular RFCs these days - especially ones that would claim to be that important, then again it's the first time I've heard of this!

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