anivio
The wiki says that i should use ".local" if i use the server only locally.
That is really Windows server parlance.
It has been said before in these forums, that that naming scheme is not advisable with SME server.
Please provide the link to that advice as it should really be "amended" IMO.
I have tried it but it did not work. I am still getting the failure notice e-mails.
You imply you are using a SME server behind another SME server. Then set the server domain name (ie on the SME in server only mode) to have the same domain name as the main server (I assume the main server is in gateway server mode).
I assume wanadoo.fr is your ISP and they are blocking the mail for anti-spam reasons.
Do you have reverse DNS & SPF setup for the main domain so that your ISP & other mail servers do not reject mail coming from your server ?
Someone has told me that it is not recommend to use dynamic dns services for a mail server. He said that i should use my internet service provider to handle my mails.
It depends on the degree of mission critical & reliability requirements.
A mail server will work OK most of the time with a dynamic IP (and there are many people successfully using them that way in less critical situations), but there can be times when the mail might fail ie when the IP changes and there is a finite time for external records to update.
If you are running a business and really want surety for incoming mail to your mail server, then you should have a static IP, or otherwise host mail externally as someone advised you.
Good quality ADSL accounts are only issued with static IP's nowadays in my part of the world, dynamic IPs are disappearing fast.
There was a good post a while back by one of the sme masters about dynamic IPs and mail servers, but I can't seem to easily find it.