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Undeliverable email adresses -> no email comes back
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Hello Everybody,
when we send out emails to incorrect emails we don't get any bounces at all (we download them per Multipop to our local MDaemon).
However, when we bypass MDaemon and access an IMAP account at our hoster direct, we *do* get bounces.
So seem like I have managed to misconfigure MDaemon to reject bounces, but I have no clue on how to narrow down the issue or where to start. Any ideas what to look for maybe?
Best regards
Klaus-Peter
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Are the messages being sent out via MDaemon? What does the outbound SMTP log show is happening?
In Remote Administration under Setup | Mail Queues/DSN, in the section for "Fate of underliverable mail" do you have the box for "Inform the sender that the message could not be delivered" checked?
If MDaemon is successful delivering the message, then it is up to the server that was not able to deliver the message to generate a bounce. If you are collecting inbound mail from MultiPOP, I would expect that the bounce is sent to the account that is being MultiPOP'd. Which is what I think you mean when you say that if you access an IMAP account at the hoster you do get bounces. That means we need to look at the MultiPOP log to see if MDaemon is downloading the bounces via MultiPOP. And if they are being downloaded where the messages are being routed to in MDaemon.
Please confirm if you are using MultiPOP or DomainPOP to collect the messages. DomainPOP does a parsing process to attempt to determine who to deliver the message to. MultiPOP should put all the mail in the account that has the MultiPOP configured. You can check for DomainPOP configurations by going to Setup | DomainPOP.
If you are using DomainPOP, check the domain POP log, it should contain the parsing activity.
If you are using MultiPOP, then check the MultiPOP log, it should show the mail being downloaded via MultiPOP. In either case there will also be routing information in MDaemon's routing log.
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Hello Arron,
thank's for answering my post! That's superb service, almost no other software company is offering. Always worth a recommendation your software and your service! Thanks!
As to the problem itself:
>In Remote Administration under Setup | Mail Queues/DSN, in the section for "Fate of underliverable mail" do you have the box for "Inform the sender that the message could not be delivered" checked?
--> yes this is checked.Yes, we use Multipop to send and receive emails.
While I can find my sending-lines in the MDaemon...all.log and MDaemon...Routinglog I cannot find anything coming back in.I have started a ticket with my hoster to see if they have an idea.
Best regards
Klaus-Peter
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Update: my provider says that "bouncing" are being sent back to the sender.
We tested this and this is what they have sent back:
"This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: unsinn@may-marketing.de host mxlb.ispgateway.de [80.67.18.126] SMTP error from remote mail server after RCPT TO:<unsinn@may-marketing.de>: 554 Sorry, no mailbox here by that name"
Any idea what I might test / look at?
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If the ISP is generating the bounce, and you can see it in the hosted mailbox, then we need to figure out if its being downloaded by MDaemon.
Can you upload MDaemon's MultiPOP and routing logs for a day where a bounce was missing along with the value of the SUBJECT and DATE headers for the bounce message?
You can upload files to https://mdaemon.sharefile.com/r-rc3922c1eed334d4dbf5e34f0bd04ccd6. After selecting the file to upload don't forget to click the Upload button. And please let us know the name of the file you are uploading once its complete.
Thanks!
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HI Arron, ok, I uploaded the files. I sent the testmail to "example@may-marketing.de" (the domain is ours as well, but there's no such user).
Kind regards
Klaus-Peter
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At the time when the logs ended, the MultiPOP check had not seen the bounce message yet.
POP3 clients connect to the server, clients asks the server for a list of messages, client downloads messages. If the server doesn't tell the client about the message then the client can't download the message.
From the time the test message was sent until the end of the log, the POP3 server only reported 1 message in the mailbox of the sender, and based on the details in the routing log, it was not the bounce message. Can you confirm the date/time on the bounce message and that the bounce was in the mailbox of the sender when the log ended? If the bounce message existed in the mailbox at the ISP, then why is the POP3 server not telling the POP3 client about the message?
I don't know why the ISP's POP3 server is not telling the POP3 client about the message, the only thing that I can think of that might cause it is that the message is not in the Inbox. POP3 servers only work on the Inbox. If that isn't it, I would ask for assistance from the mailbox provider, they should be able to assist.
The other option is that the message was not in the mailbox at the ISP yet, in which case, I'll need another set of logs that include the time period when the message was placed into the mailbox at the ISP and MDaemon did its next POP check of the account.
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Hello Aarron,
when I use the webmailer of my hoster and send an email to nonsene@blablaba.de I DO get an undeliverable email back.
If I use my local outlook + MDaemon nothing comes back (in the webmailer; we poll only every 15 minutes).
Is there a mechanism which does not send out faulty emails at all (doesn't make sense to me, but the symptoms are
the way they are).
Best regards
Klaus-Peter
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Can you run another test for me?
Freeze MDaemon's Remote Queue, then go to Outlook and send a message to an email address that you know will bounce. Go back to the MDaemon server and find the MSG file for the test message in MDaemon's remote queue and upload a copy of it to us.
https://mdaemon.sharefile.com/r-rc3922c1eed334d4dbf5e34f0bd04ccd6
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Hello Arron,
I've uploaded the file. Is this the data you need?
Kind regards
Klaus-Peter
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If you send an email from Outlook through your MDaemon, to a bad address, do you see a bounce in the webmail of your hosting provider or when accessing the mailbox directly via IMAP?
If you do see the message in the mailbox at the hosting provider, is the message in the inbox? If its not in the inbox, it cannot be downloaded via POP. If the message is in the inbox, please provide a MDaemon multipop log that shows the first POP3 check after the message was placed into the mailbox along with a routing log that shows what was done with the message after MDaemon downloaded it.
If you do not see the message in the mailbox at the hosting provider, then we need to look at MDaemon's outbound SMTP log that shows MDaemon attempting to deliver the message. If the log shows MDaemon successfully delivered the message, then its up to the receiving server to generate the bounce if the message is not deliverable. We would need help from the admin of the receiving server to understand what is happening.
If MDaemon's outbound SMTP log shows the message being bounced, then we need to look at MDaemon's routing log to see what is happening to the bounced message.
