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Prototype

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My pop3 download errors on some emails. See below

[17/Mar/2009 12:26:11] Recv: Queue-ID: 49bf96e3-00000015, Service: POP3, From: <user<at>sendersdomain.com>, To: <NULL>, Size: 4759, server isp.pop3download.com, user username<_a.t_>pop3download.com, mailbox {X-Envelope-To}

17/Mar/2009 12:26:12] POP3 download: 1 message (4759 bytes) downloaded from server isp.pop3download.com, with username username<at>myisp.com

[17/Mar/2009 12:26:13] Recv: Queue-ID: 49bf96e5-00000016, Service: DSN, From: <>, To: <user<at>sendersdomain.com>, Size: 3740, Report: failed

[17/Mar/2009 12:26:13] Sent: Queue-ID: 49bf96e3-00000015, Recipient: <username<at>myisp.com<at>isp.pop3download.com>, Result: failed, Status: 5.3.5 Mailbox invalid or does not exist

Question is how can I stop this and why does it not affect all users sending to my domain? There is no address in the header so I just get To: <NULL>

Ideas please

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Prototype

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anthony.somerset

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i assume you have one pop box per user?

if so you need to set deliver to mailbox option

otherwise if its one big pop box you need to set up sorting rules

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Prototype

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Yes we have just one pop3 mailbox as a catchall. Sorting rules are setup and work for most emails problem is when some mails come through there seems to be no address in the header hence the To: <NULL> in the mail logs.

When a mail comes through like this it bounces back to the sender.

How can I get around this?
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anthony.somerset

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normally mail without a TO: header is often spam

however if people are CC"ing or BCC'ing, you will need to add those sort rules as well, the only problem is there may be duplications of email, i dont know too much about this though

Mac Xserve Intel - 2x 2.7GHz Dual Core Xeon
Leopard 10.5.8
4GB Ram
1.25 TB HDD Raid 5
Kerio 6.7.1
~60 Users (varying windows and mac Exchange or IMAP)
18 iPhones
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Prototype

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No its def NOT spam. I had the sender contact me saying he had a bounce back.

He only address the mail to me and didnt CC or BCC. This is what I can't work out.

Why does it come in as To: <NULL>???

It doesnt matter how many sort rules I have setup Kerio sees no address in the TO: line so bounces it back

HELP!!!!!
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anthony.somerset

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hmm

just to clarify this only happens to certain emails, or does it happen to most emails?

i would suspect that it is an issue on the senders end, either his email client is not properly tagging the to field, his isp is not dealing with it correctly or possibly your isp removes the TO: tag as its a pop download box

have you tried the X-Envelope-To header as well?

Mac Xserve Intel - 2x 2.7GHz Dual Core Xeon
Leopard 10.5.8
4GB Ram
1.25 TB HDD Raid 5
Kerio 6.7.1
~60 Users (varying windows and mac Exchange or IMAP)
18 iPhones
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Prototype

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anthony.somerset wrote on Mon, 23 March 2009 20:31

hmm

just to clarify this only happens to certain emails, or does it happen to most emails?

i would suspect that it is an issue on the senders end, either his email client is not properly tagging the to field, his isp is not dealing with it correctly or possibly your isp removes the TO: tag as its a pop download box

have you tried the X-Envelope-To header as well?



Answer to first question is yes that is corrent.

Answer to X-Envelope-To is also yes I have tried this but still rejects/bounces the mail. The email is getting its header striped but I dont know why. Other people also sending through the same isp dont have this problem sending to me
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anthony.somerset

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i have to admit this one has me stumped, and my only thoughts are that the senders email client is not handling the headers correctly, which means they end up getting stripped by the time we get into your pop box.

we had this problem briefly but it was our ISP at fault modifying the headers before the pop download, we ended up solving it, by moving our MX records at dns pointing to our kerio server for all mail on the domain. but i dont know how appropriate this is for you

it is interesting to note, our temporary work around was to have a catchall account into the postmaster box (or whichever you prefer) and then i manually forwarded the email on because my email client still read who it was addressed to, it was fine for about a week or so, but not suitable as a long term solution as people click reply and then you end up becoming the mail server yourself by forwarding things on or letting people know that they replied to you and not the original sender!

Mac Xserve Intel - 2x 2.7GHz Dual Core Xeon
Leopard 10.5.8
4GB Ram
1.25 TB HDD Raid 5
Kerio 6.7.1
~60 Users (varying windows and mac Exchange or IMAP)
18 iPhones
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subnet

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Hi,

i know this was six months ago, but I had the same problem with one of our clients. Kerio could help me that time, so I dicided to create individual pop accounts for everybody on the mail server and my ISP. After that it worked smootly. And after that I manually forwarded all the emails to the clients. wow that were sleepless nights. LOL

Regards,

Cliff
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Prototype

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Hi, thank you for the advice. I will try this and let you know
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