If your friend is suffering problems with the Eircom SMTP (Simple Mail Transfer Protocol) servers he can bypass these and transmit his mail directly from his machine using something like
Local SMTP Relay Server free download. Local SMTP Relay Server is a SMTP server program for Windows that lets you send email messages directly from your computer. Along with a mass mailer t...
After installing one and starting it, change the outlook mail account settings so that the local machine name is the smtp server name and not the eircom smtp server name. Then all sent email will go direct from their machine and not touch the Eircom SMTP server.