When you send email thought ISP outgoing mail server. Most ISP limit thier SMTP accepted message size around 0.8-2.0 MByte.

I configure my qmail SMTP so that all message delivered to my hosting customers beyond 2MB can't pass it since I've been suggested that email is not designed for sending large files , anybody know why ?

Yet some ISP are irresponsible. They allow unlimited outgoing message size to the internet . If someone send 5 MB files through these ISP to my hosing customers , the message will be rejected by my machine . It's likely that my customers will end up angry if they've been notified by sender that the message was rejected or not delivered (message lost) .

Should I continue limit SMTP message size ?

Five meg is a bit much for an email.

A download link for a file that size would be more appropriate.

Personal opinion only of course, but keep your limit.


Lats...

Thanks for your reply.

Some customers yell at me like "why didn't you tell us before that you limit your SMTP message size to only 2 MB, my busness is screwed!"

I didn't see any ISP tell their customers that they limit SMTP accepted message size to any value. Should I state in my website ?

For sure, just add it to your TOS.

It would be interesting to know what they are emailing!


Lats...

I have few clients using more then 5MB per email, they use it, to transmit power point presentation on email.

I think with the connections speeds available in U.S. it is becoming very common for email to be 5Mb - 15 MB of size. Also think about video mail. Many software's are available for video and audio mails.

Oh yes, you will definitely get 1 or 2 angry customer if you limit size to email, let them use it, after all they are paying for bandwidth. :)

hehe, don't tell me you are unlimited host. :D