receive ok cant send

G

Garry Kennedy

Hi,

I have a broadband connection through a router on a small office network (my
PC is not part of the network - i just share the broadband line) and
outlook, which had been sending and receiving my email fine, has suddenly
refused to send anything - it still receives mail without problems. The
following error message comes up if i try to send email:

The message could not be sent because one of the recipients was rejected by
the server. '550 relaying to <[email protected]> prohibited by the
administrator (failed to find host name from IP address)'. (Account
'pop.iol.ie', SMTP Server:'mail.iol.ie', Error Number: 0x800ccc79).

I didn't change any settings since it was sending mail and I am an
administrator on the PC, .... I use a PC at another location to dial up the
same account and it sends and receives fine - so no problem with the service
provider ....

Any ideas anyone ?? (Replies to group or (e-mail address removed).)

Many thanks,
 
L

Lanwench [MVP - Exchange]

Whose SMTP server are you using for outbound mail? They may require that you
authenticate to it.
 

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