Solving "552 5.3.4 Message Size Exceeds Fixed Maximum Message Size"

What is the 552 5.3.4 Error?

The "552 5.3.4 Message Size Exceeds Fixed Maximum Message Size" error occurs when a message you are sending is too large for the recipient’s email server to accept. This error could be related to your email provider’s message size limits, or the recipient’s server settings.

How do I Fix the 552 5.3.4 Error?

Check the message size limit of your email provider by logging into your account and looking at the settings. Most ISP's (Internet Service Providers) will have a suggested message size (including the contents and all attachments). If your message exceeds the limit, you will need to either resize the attachments, or split the message into multiple emails.

See if the recipient has any message size limit set in their server and if that limit is less than the size of the message you’re attempting to send. If their server limit is smaller than your message size, you’ll need to reduce the size of your message.

Some servers will not accept messages when the recipient’s mailbox has exceeded its limits. If this is the case, you’ll need to contact the recipient and ask them to clean up their mailbox by deleting any old/unnecessary messages.

FAQ

How do I check the message size limit of my email provider?

You can check the message size limit of your email provider by logging into your account and looking at the settings. Most ISP's (Internet Service Providers) will have a suggested message size (including the contents and all attachments) that you need to stay within.

What do I do if the message size limit of my email provider is less than the size of the message I'm trying to send?

If your message exceeds the limit, you will need to either resize the attachments, or split the message into multiple emails.

What if the recipient's mail server has a lower limit than my message size?

If the recipient’s server limit is smaller than your message size, you’ll need to reduce the size of your message.

What if the recipient’s mailbox has exceeded its limits?

If the recipient’s mailbox has exceeded its limits, you’ll need to contact the recipient and ask them to clean up their mailbox by deleting any old/unnecessary messages.

What is the best way to reduce the size of a message?

The best way to reduce the size of a message is to reduce the number of attachments and/or compress any large files into smaller files. You can also reduce the size of images by resizing them or converting them to a different file format.

What if the recipient is not able to reduce their mailbox size?

If the recipient is unable to reduce the size of their mailbox, you might need to contact the recipient's email provider to ask them to increase the mailbox size for that specific account.

Sources

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