I am trying to send a message with an attachment of size 40mb. I get error message "the message size exceeds the maximum limit set on the server". How to find out the maximum limit set on the server myself before asking the IT engineer? I am simple end user who can login and check/send mails without any admin privileges on the outlook server. I use outlook client 2011 and I don't know the version of the outlook server.
Read the PR_MAX_SUBMIT_MESSAGE_SIZE MAPI property (DASL name http://schemas.microsoft.com/mapi/proptag/0x666D0003) using Store.PropertyAccessor.GetProperty.
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I am using Office 365 setting for sending my project's promotional email marketing. My mail sender email address is registered with office365 and I used SMPT settings with office365. When I send email with fewer recipient's email addresses there are no error. But when I try to send email to all my customer more than 3000 recipients, I got this error.
Error screen
I think you are hitting the rate limit of Exchange Limit which is 30 message per minute. For more information please see this: Exchange Sending limits
By the way office 365, Gmail or other services like this are not suitable for bulk operations. Try using other services like AWS SES, Mailgun and etc.
I have the mail exchange server for pratice. And in this exchange server, I create a bulk recipients but still not logon anytime.
When I run Get-MailboxStatics it return an warning that:
WARNING: The user hasn't logged on to mailbox 'abc'
('76768175-4db5-4cbb-a36b-fdbde574ccbc'), so there is no data to
return. After the user logs on, this warning will no longer appear.
So with the large number recipients over 100, how can I use powershell code to stimulate that I already logon successful for all recipient in this server?
I would suggest you look at using LoadGen https://www.microsoft.com/en-au/download/details.aspx?id=40726 and that will generate load on the server which will populate all the log files for you to look at and test. (the 2013 version will run fine on Exchange 2016).
I'm using Outlook 2016 and often encounter mail delivery failure due to "Headers too large (32768 max)" when I send email. Apparently, Office 365 adds a lot of mail header information when it transfers the email. Do you know if there is any way to decrease the header infromation from client side or server side ?
Is ist possible for a user connected to Exchange Server via a client (Outlook Web App) to tamper with the e-mails in his mailbox (inbox, drafts, sent items ect.)?
Like modifying e-mail content (text, subject...) or properties (date, time, recipient...).
The core of the question is: If there is an e-mail in the user's sent items folder and this user did not have access to the Exchange Server (neither physically nor remotely, except for his standard user access), how sure (or probable) ist it, that this e-mail has really been sent on that date and time with exactly that text to exactly those recipients and that it had not been planted there at a later date?
Does it make a difference if that user only has access to his account via Outlook Web App or if he also has access via MS Outlook?
Outlook Web App is just a client so it won't allow you to modify a sent email or fake/import one as that is not a valid task for that client. You could do this at the API level using something like EWS or MAPI but that would require knowledge that most users won't have (but most likly they would have access to do it though). The Mitigation to this is if you have Litigation hold enabled https://technet.microsoft.com/en-us/library/ee861123%28v=exchg.141%29.aspx on the mailbox then any changes they did make to a message would be tracked and you would always be able to see the original version. Also if you looked at the message with a MAPI editor like MFCMapi or OutlookSpy there would be tell tails of somebody trying to fake a message like the Creation time not matching the sent time etc and other properties would most likly give it away.
One thing i would suggest is look at your Message Tracking log as they will tell you exactly what was sent and who is was sent to and the time https://technet.microsoft.com/en-us/library/bb124375%28v=exchg.160%29.aspx while these also aren't immutable it would take an administrative access to the server to modify.
I have mailbox "user1#somemail.com" and I manually changed MailItem.Sender field to "user2#somemail.com" and sent it to "user3#somemail.com". I discovered strange situation that i see email in "SentItems" folder in "user1#somemail.com" but "user3#somemail.com" not receive this message. I checked logs in Exchange server and i donæt see any error messages. Just for prof i did the same but not change MailItem.Sender property but used SentOnBehalf standart functionality. And "user3#somemail.com" receive it so issue not in permission. Just for check i used OutlookSpy and compare two emails(one email that i sent using SentOnBehalf standart functionality and outher email where i changed MailItem.Sender). You can see diferrences following. Can somebody say me where is my fault and why user not receive email when i change MailItem.Sender:
The Sender property is not meant to take a string value. You need to set it to an AddressEntry object for a user that has permissions to send from any of the loaded accounts in the current Outlook profile.
See MailItem.Sender Property:
http://msdn.microsoft.com/en-us/library/office/ff869056(v=office.15).aspx