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My emails are being quarantined by Office 365 and I need help
I am having really bad issue. We use Google Business for email and Sendgrid SMTP service via our ERP Odoo to send transactional emails. But since last week all of the customers and supplier...
It looks like it really was a DMARC issue.
DMARC takes a couple of days to kick in. On Friday i did some more tests that did not go through and all of a sudden all of the tests went through over the weekend which coincided with the DMARC being 100% authenticated.
So lesson learned, make sure you have a SPF, DKIM, and DMARC on your DNS.
Thank you for chiming in !
Hey!
Examine the following email content: Certain characteristics in your emails, such as attachments or specific text, may raise the suspicion of phishing. You noted that emails without attachments are delivered, thus it's worth investigating the files and content that may be causing the issue. Check to see if any of the attachments or content were inadvertently labelled as harmful.
Verify DKIM and SPF: DKIM (DomainKeys Identified Mail) and SPF (Sender Policy Framework) are authentication mechanisms that aid in the verification of your emails' validity. Check that your domain's DKIM and SPF records are correctly configured. This procedure entails adding appropriate DNS records to your domain's configuration.
Monitor email bouncebacks: If your emails are being rejected, you may receive bounceback messages or non-delivery reports (NDRs) that explain why the emails were refused. Examine these messages for any hints or error codes that will help you identify the problem.
Check IP reputation: If your emails are consistently being quarantined, it's possible that the IP address associated with your SMTP service (Sendgrid) has a poor reputation. This can happen if other users sharing the same IP address have engaged in spamming or other malicious activities. Contact Sendgrid support and inquire about the reputation of the IP address you're using to send emails. They might be able to assign you a different, cleaner IP address to improve deliverability.
Contact Office 365 support: If you have exhausted the above steps and are still experiencing problems, it's advisable to reach out to Office 365 support for further assistance. Provide them with all the relevant information, such as the specific error messages, bounceback details, and any steps you have already taken to address the issue. They should be able to investigate the problem and provide guidance on resolving it.
Let me know if that was any help. 🙂
Examine the following email content: Certain characteristics in your emails, such as attachments or specific text, may raise the suspicion of phishing. You noted that emails without attachments are delivered, thus it's worth investigating the files and content that may be causing the issue. Check to see if any of the attachments or content were inadvertently labelled as harmful.
Verify DKIM and SPF: DKIM (DomainKeys Identified Mail) and SPF (Sender Policy Framework) are authentication mechanisms that aid in the verification of your emails' validity. Check that your domain's DKIM and SPF records are correctly configured. This procedure entails adding appropriate DNS records to your domain's configuration.
Monitor email bouncebacks: If your emails are being rejected, you may receive bounceback messages or non-delivery reports (NDRs) that explain why the emails were refused. Examine these messages for any hints or error codes that will help you identify the problem.
Check IP reputation: If your emails are consistently being quarantined, it's possible that the IP address associated with your SMTP service (Sendgrid) has a poor reputation. This can happen if other users sharing the same IP address have engaged in spamming or other malicious activities. Contact Sendgrid support and inquire about the reputation of the IP address you're using to send emails. They might be able to assign you a different, cleaner IP address to improve deliverability.
Contact Office 365 support: If you have exhausted the above steps and are still experiencing problems, it's advisable to reach out to Office 365 support for further assistance. Provide them with all the relevant information, such as the specific error messages, bounceback details, and any steps you have already taken to address the issue. They should be able to investigate the problem and provide guidance on resolving it.
Let me know if that was any help. 🙂
Thank you guys for chiming in, really appreciated. This is really nightmarish.
I just added DMARC to my DNS records but that did not change anything.
Regarding Sendgrid, I used to have 2 dedicated IP. Ihad a zoom call with them to go over my account and optimize everything. One of the thing we did is to delete one of the IP and keep the best one. The reason being is that I only send 15k transactional emails per month and they told that it is too little for two IP. So that is optimized as well. I have this IP since December 2020 and never had any issue before last week.
My IT company who is a Microsoft partner opened a ticket with Microsoft directly to see what could cause this...
The PDF attachment that we send are the same exact ones since 2020. However I will have the links in them removed to see if that changes anything for deliverability as if i send the email without any signature and just the pdf converted in jpeg it goes through.
I will keep you guys posted to ensure we get to the bottom of this for the next person that would have the same type of issue.
I just added DMARC to my DNS records but that did not change anything.
Regarding Sendgrid, I used to have 2 dedicated IP. Ihad a zoom call with them to go over my account and optimize everything. One of the thing we did is to delete one of the IP and keep the best one. The reason being is that I only send 15k transactional emails per month and they told that it is too little for two IP. So that is optimized as well. I have this IP since December 2020 and never had any issue before last week.
My IT company who is a Microsoft partner opened a ticket with Microsoft directly to see what could cause this...
The PDF attachment that we send are the same exact ones since 2020. However I will have the links in them removed to see if that changes anything for deliverability as if i send the email without any signature and just the pdf converted in jpeg it goes through.
I will keep you guys posted to ensure we get to the bottom of this for the next person that would have the same type of issue.
- it looks like DMARC is slowly propagating as I am receiving emails with the DMARC results slowly from different domains such as yahoo, aol, and att
Hopefully that was the issue and it will take another 24-48h to solve