Email with attachments won't send

(0) Share

Report

Posted on by yleclerc

1,549

Problem: Outgoing Emails with attachments larger than 97 400 bytes won't send.

I have done extensive tests to figure out why some emails won't send from CRM. All emails without attachments get sent out - no problem there. Some emails with attachments send, others don't. We tested with differents file extensions (zip, docx, xslx, pdf, etc.) and the file type doesn't affect if the emails get sent out or not.

In the end, when the attachment size is greater than 97 400 bytes (less than 100k!), the email gets stuck (pending). If I have 3 files, and the total is under 97 400 bytes, the email get sent. If the total is above 97 400, it doesn't send.

In CRM, the maximum is set at 131 072, so that is not the problem.

We are not using Email templates. Just plain emails sent from the Case entity.

We use Server-side Sync for outgoing Emails.

We use Dynamics CRM 365 on-premise (version 8.2.2.212).

Our Exchange server is also on-premise.

Is it possible the problem comes from Exchange?

*This post is locked for comments

I have the same question (0)

All responses (5)

Answers (0)

Suggested answer

Alex Fun Wei Jie 33,628 on at

Like (0)

Report

Hi,

is this email sent from workflow? if yes, could you try with create new email instead of using email template.

Was this reply helpful? Yes No
Suggested answer

Adrian Begovich 1,027 Moderator on at

Like (0)

Report

Hi Yvan Leclerc,

The problem may be caused by an Exchange attachment size limit. This article will teach you how to find and change the Exchange attachment size limit.

Was this reply helpful? Yes No
yleclerc 1,549 on at

Like (0)

Report

@Wei Jie Fun: No. The email is created manually each time. No workflow, no template. Just a simple email and an attachment.

Was this reply helpful? Yes No
yleclerc 1,549 on at

Like (0)

Report

@Adrian Thanks! I will ask our IT team to look into it.

Do you know if there is a difference in size limits that get sent through an appplication like CRM vs an email sent directly from Outlook. In Outlook, we can send emails up to 10Mb. But using CRM, the limit seems to be 100k.

Thanks!

Was this reply helpful? Yes No
Suggested answer

Adrian Begovich 1,027 Moderator on at

Like (0)

Report

Hi Yvan Leclerc,

Outlook limits the size of files you can send. This limit prevents your computer from continually trying to upload very large attachments that exceed the limits of most Internet service providers. For Internet email accounts such as Outlook.com or Gmail, the combined file size limit is 20MB and for Exchange accounts (business email); the default combined file size limit is 10MB.

The default size limit for attachments in CRM is 5120KB/5MB but can be increased to 32768KB/32MB for older versions of CRM and 131072KB/128MB for newer versions of CRM. I have an old blog post that discusses this, which you can read here.

There is a difference between the size limits of emails sent through CRM and emails sent directly from Outlook. The current limit on the CRM side may vary from the value in set file size limit for attachments.

Was this reply helpful? Yes No

Community site session details

Email with attachments won't send

Helpful resources

Quick Links

Responsible AI policies

Neeraj Kumar – Community Spotlight

Congratulations to the November Top 10 Community Leaders!

Leaderboard > 🔒一 Microsoft Dynamics CRM (Archived)

Featured topics

Product updates

Community site session details

Email with attachments won't send

Helpful resources

Quick Links

Responsible AI policies

Neeraj Kumar – Community Spotlight

Congratulations to the November Top 10 Community Leaders!

Subscribe to this forum!

Select categories

Leaderboard > 🔒一 Microsoft Dynamics CRM (Archived)

Featured topics

Product updates