著者: David Woodhouse 日付: To: Sujit Acharyya-Choudhury CC: exim-users 題目: Re: [exim] proble m in sending mail from our sites to ceratin sites
On Mon, 2010-08-02 at 11:11 +0100, Sujit Acharyya-Choudhury wrote: > We are experiencing trouble in sending e-mails to certain sites from our Exim Gateway, which is 4.60. We don't know whether it is exim or our firewall which is causing the problem. Ordinary e-mail goes through, but e-mail with attachments fail:
>
> Below is an example:
>
> Site Shakespearesglobe.com
> Our site: westminster.ac.uk (gateways, isls-mx10, isls-mx20, isls-mx30)
>
> Shakespearesglobe.com says:
> "MTU size is currently set at 1404. Our communication line is a 10MB Managed Internet Line. We don't experience any problems communicating with any other organisations with our current MTU size. How have you resolved this problem with other organisations?"
>
> We at isls-mx30, compiled exim with 4000 MTU, but that failed to solve the problem.
>
> Any body has seen the problem like this before?
It looks like you're firewalling ICMP. Don't do that; it breaks things.
