It depends on the restrictions each ISP makes to block SPAM.

Either ISP could blocking the sending via an external SMTP mail server.
Whether there is a workaround depends on the exact error messages that
you get while sending. It might even be possible to send via A while
connected via B but not the reverse.

Because few SMTP mail servers support a logon feature, ISPs use a
variety of means to restrict access in order to reduce spam. However,
SMTP Authentication is becoming more common. Check with your ISP to see
if this is an option. In OE this is specified in Tools, Accounts, Mail,
Properties, Servers, Outgoing Mail Server, My Server Requires
Authentication. (If the Incoming Mail Server Account Name and Password
above this are not for your ISP mail account, click the Settings button
and fill your ISP settings there.)

Many ISPs require that you be directly connected to their service (not
via another ISP, corporate LAN, etc.) in order to send via their SMTP
mail server. (They match your IP address against those owned by the
service.) An exception is made for messages being sent to recipients of
their service. The typical error message will be "Cannot Relay" or "Not
Local" or "Not Gateway", "Not Allowed Rcpthost" or something similar. A
workaround for this is to use the SMTP mail server of the service that
you connect via, but leave your other settings the same. And for some
mail services, the SMTP Authentication may be needed. In OE this is
specified in Tools, Accounts, Mail, Properties, Servers, Outgoing Mail
Server, My Server Requires Authentication.

Some ISPs block access to other SMTP mail servers while connected via
them. (They block TCP/IP port 25 except to their own SMTP mail server.)
Some of these ISPs will make exceptions if you present a compelling
reason to do this. The error messages may indicate network is
unreachable, access denied, or timeout errors (socket errors 10051,
10061 and 10060.) Another workaround for this is to use the SMTP mail
server of the service that you connect via, but leave your other
settings the same. In some cases you can use Port 587 or 465 rather
than port 25 (specify in OE at Tools, Accounts, Mail, Properties,
Advanced). Your ISP is more likely to allow this port. The SMTP mail
server has to support this port. SMTP Authentication will likely be
required. In OE this is specified in Tools, Accounts, Mail, Properties,
Servers, Outgoing Mail Server, My Server Requires Authentication.

--

Mike - http://pages.prodigy.net/michael_santovec/techhelp.htm


"bill" wrote in message
...
Hi Guys

Is there a way to send mail from a different service provider? IOW, if
I logon to ISP A I can receive mail from ISP B with no problem but I
cannot send. Is there some way to do this ??

Any help, tia.

Bill