Recently We have switched from Email Router to Server Side Synchronization (CRM On-Premise). Switching was successful and mailbox also seems active and showing incoming and outgoing processing status as success but when I am trying to check emails through incoming queue no emails getting created and not even email message records created in entity.
We are using self signed certificate and not CA Approved SSL. can Self Signed cert be the reason of this issue?
We are using self signed certificate and not CA Approved SSL. can Self Signed cert be the reason of this issue?
I found the issue, The issue was with one of the setting. Under Set Personal options- > Email-> Select Track=All Email Messages and it stared working
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I have noticed something very odd about certain emails sent on outlook via an exchange server -- it appears if certain URLs and embedded in the message, message send will fail silently. The message will show up in the "sent items" folder, but it is never actually received by the recipient.
I checked in with GoDaddy who supports my Office365 subscription and they confirmed the behavior (they couldn't send successfully send it either, other me or others in their organization) but had no explanation for the behavior.
I have confirmed that the message sends normally if I use one of my gmail accounts through outlook or or an icloud email account. But my two exchange accounts (on different domains) neither send nor receive any email with this particular embedded url:
(Makes no different if sent in plaintext or not). And other emails, with either no urls or even other urls, send normally. Does Microsoft have a problem with foundation? Or with NFTs or something?
https://foundation.app/#NyanCat/foundation/219
This happens to be the NyanCat NFT that sold for ~$700K a while ago, but no idea what it is about simply the presence of the URL in the body of the message to cause it to fail silently when sent or received on an Exchange server. Not sure if impacts other Exchange servers besides GoDaddy's, but does can anybody explain how this even happening or why?
When creating Calendar Events via the Graph API, the events are created correctly in the calendar of the organizer but the invites to the participants get bounced. The organizer gets a 'Delivery has failed...' message with the following error message:
Remote Server returned '550 5.7.708 Service unavailable. Access denied, traffic not accepted from this IP. For more information please go to http://go.microsoft.com/fwlink/?LinkId=526653 AS(7171)
Sending emails manually through Outlook (web) from the organizer to the participants works fine.
The issue is intermittent. After changing the DNS server, everything worked fine for some time.
I checked https://protection.office.com/restrictedusers as suggested in the answers to similar posts, but this list is empty.
I also tried delisting the IP address (my own?) through https://sender.office.com/, but to no avail.
The tenant is linked to the Microsoft Developer Program and would allegedly have a 'bad reputation'. However, I don't understand how that would explain the fact that it sometimes works and sometimes doesn't when sending exactly the same API request and hence 'triggering' exactly the same emails...
I think the best way to overcome this would be to add a domain to your developer tenant as per the guidance here:
https://learn.microsoft.com/en-us/Exchange/mail-flow-best-practices/non-delivery-reports-in-exchange-online/fix-error-code-5-7-700-through-5-7-750#57750-client-blocked-from-sending-from-unregistered-domain
Add and validate all domains in Office 365 that you use to send email messages. For more information, see Add a domain to Office 365.
I'm not guaranteeing this will resolve it. You have to understand that those developer tenants are only meant for experimentation and so there are checks and balances to ensure they are used in a bad manor.
How many emails are you sending through this tenant?
Calendar events are sent out via email. Add the "Mail.Send" permission to you App Registration.
This solved it for me.
I am facing problem regarding Outlook app. I have successfully connected webmail with outlook app, but when I delete email from Webmail then it also delete from Outlook. I don't want to delete from my ourlook app. It should keep it for my record.
One of my friend told me that he is getting mail directly from the sender to outlook app without storing a single mail on webmail server.
How can I customize settings to get my issue resolved?
If mail connection is IMAP, a delete will remove the mail everywhere.
If mail connection is POP3, it will not.
I have an Exchange 2013 server.
Faced with a strange issue of email delivery what I can not solve.
Exchange is rejecting email
if one of the recipients is not exist in a domain
Email will be rejected totally and sender will receive NDR for not existing user.
scenario:
Exchange mailboxes user#domain.com // valid user
user1#domain.com //**user mailbox is not exist**
Sending email from external domain to my exchange server:
TO: user#domain.com,user1#domain.com
Reciving NDR Remote Server returned '550 5.1.1 RESOLVER.ADR.RecipNotFound;
valid user didn't receive email also.
email is rejected
.
I start to google and found that How do I reject incoming email for unknown users in MS Exchange 2013?
exchange has a user validation feature that is enabled by default
I disable it on a console restart transport role.
Set-RecipientFilterConfig -RecipientValidationEnabled $false
run the same scenario again
user#domain.com, user1.domain.com
I receive NDR for not existing user.
but email was delivered to valid user.
Is it a normal behavior for exchange?
What is right by RFC deliver for valid users or reject email?
how it will affect our server hit the public spam list?
Does this not reduce our spam filter resistance?
Please advice.
Thank you.
It's normal for Exchange to send an NDR for non existing users. As you already said, this might also trigger some spam lists because you are sending out mails (NDR) to possible spam honey pots.
A better way to do this would be to have your external MTA (the server which accepts the mail from the internet) check the recipients and refuse to accept mail for non existent email addresses. This way you would never have to send out NDR reports, as the server trying to deliver mail would be informed that it cannot deliver and notifies the sender itself.
We've been using Mandrill for years to deploy our app's signup confirmation and password reset emails. This has worked perfectly as we've had SPF and DKIM records added to the DNS configuration according to Mandrill's documentation for verifying sending domains.
However, after merging the Mandrill account with a new Mailchimp account--which is mandated by April 27th--it's requiring me to send a verification email to an address at that domain. The problem is that we don't have a mail server set up to receive emails. The domain is only used to send the "noreply#domain.com" emails.
Any ideas on how I might resolve this? Mailchimp is not giving an option to undo the merge, so effectively I have an app that users are not able to sign up for at the moment, which is problematic to say the least.
You'll want to configure at least one mailbox on that domain somehow to receive mail. That's the only way to confirm ownership of the domain.