Your message exceeds the maximum allowed by the server

Question

After many years my Mail refuses to work properly:
This message could not be delivered and will remain in your Outbox until it can be delivered.
Your message has size 1,6 MB, which exceeds 1,0 MB, the maximum allowed by the server.
I created another account but problem remains.
I talked with my internet provider and the problem is only with Mail.
Thanks.

Answer 1

Is this for a .Mac account?
If so, check this link which the following was copied from.
http://docs.info.apple.com/article.html?artnum=25301
There is also a 10 MB maximum size for messages sent or received using the .Mac mail system.
There is nothing wrong with Mail and you would experience the same with any email client such as Mail on a Mac or a Windows PC.
Most ISPs and email account providers have the identical 10 MB overall message size limit for received and sent messages. In fact, I know several people who have a smaller overall message size limit such as 5 MB so this is not unusual.
Even if your ISP or email account provider for your email account has a larger overall message size limit, the overall message size limit must be under the recipient's overall message size limit imposed by their ISP or email account provider for their email account or your sent message will be rejected by the recipient's incoming mail server.
All message attachments must be encoded before being sent and decoded when received. Mail uses MIME 1.0 for attachment encoding/decoding which is the internet standard but a problem with MIME is it isn't very efficient.
The attachment encoding process increase the size of the pre-encoded file by roughly 50% or so. A 5 MB file (pre-encoded) will be roughly 7.5 MB in size after the attachment encoding process.