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Cannot receive calendar invitations, but email is fine from specific domain

Posted on 2013-01-16
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Last Modified: 2013-01-22
Morning,

I have an interesting query where we happily receive our clients emails, but not his calendar invites.  I cannot see why not for the life of me.

We use Exchange 2010, we route our email through Symantec Cloud/Message Labs and have Sophos Pure Message installed as well.

Looking at the Symantec Cloud Track and Trace Logs, the invites are rejected by our Exchange server:

2013-01-16 10:24:32
Connection from: 91.220.42.83 (service145.mimecast.com)
2013-01-16 10:24:32
Sending server HELO string:service145.mimecast.com
2013-01-16 10:24:32
Message id:OF085A2065.F0B107ED-ON80257AF5.00392F13-80257AF5.00392F2D@turntown.co.uk
2013-01-16 10:24:32
Message reference: 135833187200000157503200001193012
2013-01-16 10:24:32
Sender: iwona.stuczynska@turntown.co.uk
2013-01-16 10:24:32
Recipient: simon.johns@davidchipperfield.co.uk
2013-01-16 10:24:32
SMTP Status: OK
2013-01-16 10:24:32
Delivery attempt #1
2013-01-16 10:24:32
Recipient server: 62.173.127.26 (62.173.127.26)
2013-01-16 10:24:32
Response: 451 4.4.2 [internal] connection closed by remote host
2013-01-16 10:31:31
Delivery attempt #2
2013-01-16 10:31:31
Recipient server: 62.173.127.26 (62.173.127.26)
2013-01-16 10:31:31
Response: 451 4.4.2 [internal] connection closed by remote host
2013-01-16 10:44:39

I cannot see why email from same sender is accepted, calendars are not.

Below is email delivery from same sender to same recipient:
2013-01-16 10:36:45
Connection from: 91.220.42.83 (service145.mimecast.com)
2013-01-16 10:36:45
Sending server HELO string:service145.mimecast.com
2013-01-16 10:36:45
Message id:OF1A7A177C.2684124A-ON80257AF5.0038E06C-80257AF5.003A4D6C@turntown.co.uk
2013-01-16 10:36:45
Message reference: 135833260400000192408370001039015
2013-01-16 10:36:45
Sender: iwona.stuczynska@turntown.co.uk
2013-01-16 10:36:45
Recipient: simon.johns@davidchipperfield.co.uk
2013-01-16 10:36:45
SMTP Status: OK
2013-01-16 10:36:49
Delivery attempt #1 (final)
2013-01-16 10:36:49
Recipient server: 62.173.127.26 (62.173.127.26)
2013-01-16 10:36:49
Response: 250 2.6.0 [InternalId=1131838] Queued mail for delivery
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Question by:IT_Chipperfield
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6 Comments
 
LVL 41

Expert Comment

by:Amit
ID: 38782622
What email software used by your client. I remember same issue, where calendar invites are stuck or failed to delivery. You need to ask client to check at their end.
0
 

Author Comment

by:IT_Chipperfield
ID: 38782661
Hi - they are using Lotus Notes!  I have asked the client to check their end too.
0
 
LVL 41

Expert Comment

by:Amit
ID: 38782673
Ask them to sent a test invite to your public account like Gmail or Yahoo that can confirm where is the issue.
0
Too many email signature updates to deal with?

Do you feel like you are taking up all of your time constantly visiting users’ desks to make changes to email signatures? Wish you could manage all signatures from one central location, easily design them and deploy them quickly to users? Well, there is an easy way!

 

Author Comment

by:IT_Chipperfield
ID: 38786300
Yes - invitations reach other recipients, we receive other calendar invites - just not from this one domain.  We do get their email though.

...Simon
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Accepted Solution

by:
IT_Chipperfield earned 0 total points
ID: 38787222
All fixed - our Watchguard IPS was denying the mail with calendar attachments from the specific domain.
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Author Closing Comment

by:IT_Chipperfield
ID: 38804762
Need to analyse the IPS now ton understand why...
0

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