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I'm getting an error "Max message size exceeded"

What to do when you get an error saying that your email message is too large.

V
Written by Victor Fteha
Updated over a month ago

If you're submitting a deal but:

  • It's not going through

  • No one is receiving it

  • The submission says "Errored"

A likely cause is that the files are too large.

Please hover over the submission record and click "View Error".

If you see a message like this:

Message failed: 552-5.3.4 Your message exceeded Google's message size limits. To view our
552-5.3.4 message size guidelines, go to
552 5.3.4  https://support.google.com/mail/?p=MaxSizeError 6a1803df08f44-7077cd558f4sm62319706d6.43 - gsmtp

This error message means that the files you're submitting combine for over 25 MB.

Google has a limit on the size of files that you can send through them, and that's whether you're sending through an app like MCA Pilot or whether you send it directly from Gmail itself - you'll always have that limit.

Or you might see an error like this:

Message failed: 550 Error reading data, max message size exceeded

Which means the email was rejected by the recipient's mail server. Most email providers have similar attachment size limits (25 MB, 30 MB, etc.) so they won't accept any incoming email with files larger than that.

Solution: Use Compress Statements

MCA Pilot has a built-in feature to automatically compress your bank statement PDFs and keep them under the 18 MB safe limit:

  1. Open your deal and go to the Underwrite tab

  2. In the Files section, click the Compress Statements button

  3. Track the progress in the Updates panel on the top right

  4. Once complete, the update will show the final file size and whether it's safe to submit

  5. If the size is below 18 MB, resubmit to the same funders using the Submit button

If the compressed files are still above 18 MB, the Updates panel will warn you. You may need to split statements across multiple submissions or use alternative file-sharing methods.

Alternative: External Compression Tools

If you need to compress files outside of MCA Pilot (such as non-PDF files or documents in other fields), you can use these free tools:

After compressing externally, re-upload the files to your deal and resubmit.

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