Trying to send email via SMTP on your own servers cannot be guaranteed. ISPs will push the connection through their own servers, block the connections to remote servers and generally cause a lot of problems. You should avoid using plain SMTP for roaming users if possible, particularly if you need to keep a copy of the email on the server.
If you need the email to go through your own servers then you have three options. - If Exchange 2003 or higher RPC over HTTPS or OWA. - VPN - If you aren't using Exchange then you could also look at TLS/SMTPS if your server supports it on another port - 465. Technically legacy, but most email servers and clients can be configured to use it. Ping/nslookup means nothing other than a packet is being sent back. As a troubleshooting tool it is about as much use as shouting in a valley "is there anyone there?". What you should be doing is seeing whether you can telnet to the port. That will confirm connectivity. telnet server.domain.co.uk 25 If the cursor just sits there then the traffic is being blocked. Simon. -- Simon Butler MVP: Exchange, MCSE Amset IT Solutions Ltd. e: [EMAIL PROTECTED] w: www.amset.co.uk w: www.amset.info Need cheap certificates for Exchange, compatible with Windows Mobile 5.0? Go to http://www.certificatesforexchange.com/ for certificates for just $20 a year. Now includes SAN certificates for Exchange 2007 for just $59 a year. Need a domain for your SSL certificate? http://www.domainsforexchange.net/ -----Original Message----- From: Oliver Marshall [mailto:[EMAIL PROTECTED] Sent: 07 April 2008 15:28 To: NT System Admin Issues Subject: RE: Vodafone 3G-USB and SMTP servers Will do. If Vodafone is forcing the use of their own mail servers, well.....errrrr....that's a bugger. We'd like to make the sales chaps use our own mail server in order to keep the archive correct. Can anyone think of a work around ? Olly -----Original Message----- From: Ames Matthew B [mailto:[EMAIL PROTECTED] Sent: 07 April 2008 15:20 To: NT System Admin Issues Subject: RE: Vodafone 3G-USB and SMTP servers Try this server: send.vodafone.net -----Original Message----- From: Oliver Marshall [mailto:[EMAIL PROTECTED] Sent: 07 April 2008 15:03 To: NT System Admin Issues Subject: Vodafone 3G-USB and SMTP servers Lo gang, Anyone here getting a problem with Vodafone 3G enabled laptops (either usb adapter based machines or inbuilt 3g units) and sending mail via smtp servers? We've just got 3 3g cards for laptops. No matter what mail server we try to use they all return either AUTHORISATION REQUIRED or TOO MANY CONNECTIONS. We've tried our own mail server here, sending via our mail filtering service, sending straight to client mail servers, our hosted PLESK mail server etc. All the same. Vodafone as usual are being as helpful as choco-teapots and giving us a standard response, but the problem only happens when using the Vodafone service. Using the T-Mobile equivalent works fine as does the wifi down the road, our office connections, home adsl lines etc. Pinging the mail servers comes back with the right IP, and tracerouting to the mail servers shows it's hitting the box. Anyone else seen the same thing? Olly ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! ~ ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~ The information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). The information in this communication may be confidential and/or legally privileged. Nothing in this e-mail is intended to conclude a contract on behalf of QinetiQ or make QinetiQ subject to any other legally binding commitments, unless the e-mail contains an express statement to the contrary or incorporates a formal Purchase Order. For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. Emails and other electronic communication with QinetiQ may be monitored and recorded for business purposes including security, audit and archival purposes. Any response to this email indicates consent to this. Telephone calls to QinetiQ may be monitored or recorded for quality control, security and other business purposes. QinetiQ Limited Registered in England & Wales: Company Number:3796233 Registered office: 85 Buckingham Gate, London SW1E 6PD, United Kingdom Trading address: Cody Technology Park, Cody Building, Ively Road, Farnborough, Hampshire, GU14 0LX, United Kingdom http://www.QinetiQ.com/home/legal.html ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! ~ ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~ ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! ~ ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~ ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! ~ ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~