Mail servers both outbound and inbound may have such size limits. As far as outbound goes you should be able to check this or ask your sysadmin. You have no way of guaranteeing the size limit of a target mail system, or if a particular user has any inbox size limits.

You could attempt to compress files before sending or send them a link to download the file via http/https, perhaps requiring them to login via a suitable authentication mechanism.

Updated: Added 'such' in first sentence.

In reply to Re: ZIP and Email attachments by marto
in thread ZIP and Email attachments by kalyanrajsista

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