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Home » Kerio User Forums » Kerio Connect » our customers received bounces emails from our kerio server (bounces emails)
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janu

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We have a problem with receiving emails from our customers because they receiving message:

bounces+2302347-our-email-server<_at_>sendgrid.....

How we can fix this? Any ideas will be appreciated.

janu
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blimonet is currently offline blimonet

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hi,

Do you have this problem with all your mailbox ?
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janu

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Yes I have. Its looks like our Kerio server (v. 9.2.5 patch 3 (3336) is blocking messages from a sender. It is strange that the resented message came without problems.

janu
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janu

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sorry it should be : resend message (not resented)

janu
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Bud Durland is currently offline Bud Durland

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If a message is rejected at first, but then later a message from the same sender is accepted, Gray listing may be at the root of it. Basically, with the first attempt, Gray Listing will respond "I'm busy, try later", and on subsequent attempts from that sender will accept the mail. It could be that the sending server interprets that first "I'm busy" response as a failure, rather than re-queuing the message for another attempt.
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Kcaldera is currently offline Kcaldera

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We had this problem when I migrated our domain in KC, and forgot to update our external Reverse DNS/PTR records with TimeWarner.

So we had a domain of Company-A.com. We had an alias of Company-B.com. My boss wanted to change our email domain to Company-B.com. So I needed to do the following...
-Change the server InternetHostName to Example.company-b.com
-Change the external TimeWarner DNS/PTR records to reflect that 24.93.41.125 is now Example.company-b.com
-Change the top DNS settings provide by Godaddy to reflect the same as TWC.
-Change the Microsoft Exchange Online Protection spam filter DNS settings to reflect the same.

I am not saying that this is your specific problem per say. But, if you have made any changes to your server name, ip address, or other, make sure your DNS settings were updated too.

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janu

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We do not have a grey list.

janu
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freakinvibe is currently offline freakinvibe

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You should enable "SMTP Server" logging in the Kerio debug log and then ask one of the clients to send you a message.

One strange thing I see is that it say "Sendgrid" in the sender email address. Sendgrid is doing massmailings. Do you have any dealings with them or have you set up a mailing list with them?

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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janu

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I have no dealing with sendgrid. As a dealer we are receiving customer's orders from main company webshop page.

janu
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freakinvibe is currently offline freakinvibe

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You should enable "SMTP Server" logging in the Kerio debug log and then ask one of the clients to send you a message.

Please post the relevant log snippet here.

Also, it would be good to post the content of a failure message that the senders get.

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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janu

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Thank you for help. Weird but started working in itself without any changes in the server. At least for now.

janu
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