On 2011-02-08 12:00, Benoit Panizzon wrote:

Hello

[193.247.250.7 listed in dnsbl-1.uceprotect.net] [Blocked - see http://www.spamcop.net/bl.shtml?193.247.250.7] [193.247.250.7 listed in cbl.abuseat.org]

I suppose I'm not the only one constantly getting customers complaints about email from mobile devices getting flagged as spam because the swisscom gprs ip addresses can be constantly found in various blacklists.

Should not matter, as long as you use port 587 with SMTP-AUTH and TLS. For that matter, one should never do a direct SMTP conversation from a client. Of course you should not do an RBL check on port 587 on the server side... the authentication should take care of that.

(And if your silly iDevice does not support SMTP-AUTH, well ask the iCompany that you paid all that money to for iSupport, they'll probably answer that you should download more iGames from the iStore though)

Now the fun detail of course is why their Port 25 inspection does happen on DSL (even though they have never officially told this to any customer by sending them an email or a letter that they changed this and are thus snooping people's email).

And the next fun detail is why they don't catch the customers who are sending over Port 25 from registered GPRS accounts.

Greets, Jeroen