In these days of high-speed Internet access via cable systems, we think little about sending large attachments with our emails. We can send and receive them easily, so we forget that not everyone can.
The maximum email size you can mail depends on what YOUR ISP allows and what your recipient’s ISP allows.
Your recipient may have a limited mailbox size (often these are in the 5MB to 10MB range, but I’ve heard from a local DSL user that their DSL provider has a 1MB mailbox size limit for its cheapest accounts. Even one full-size photo could be too much for those mailboxes (they need a Gmail account with a 2+ GB mailbox).
Another factor that affects attachments is that, files that you send as attachments are not sent in the same format via email. They are sent in a much larger form. We don’t notice it happening, but the attachment is encoded using a standard system called UUEncoding.
Continue reading about Email Attachment Size
