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7.6

Unable to send email - error 550.5.7.1

Asked by sjgrey in Eudora Email Client, Simple Mail Transfer Protocol (SMTP)

Tags: Internet access from remote location

I have read the existing questions that refer to this error but our problem is a little different.

One of my colleagues, an Australian resident, is working in India.  He has been able to access the internet from hotel networks around the globe until a couple of days ago when, in India, he found he could receive but not send email and he received the error message 550.5.7.1.  It appears as if the error message is issued by our ISP's SMTP srver with a typical one being as follows.

"MAIL FROM:<Cooper@Broadleaf.com.au> and then the SMTP server [mail.optusnet.com.au] said: 550 5.7.1 (Cooper@Broadleaf.com.au>... Forged sender address."

This began with no apparent changes being made to the laptop being used.  The ISP claimed it meant that the SMTP address setting had to be changed to suit the local provider but the email had been workng fine till then.

Since then my colleague has attempted to use a friend's PC card that connects through the Reliance cell network (Indian GSM network), which has worked on previous trips, and has received the same error message.

Other points of interest:
 - Emails can be received as normal
 - Webmail works fine
[+][-]11/20/08 05:32 PM, ID: 23009951Accepted Solution

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About this solution

Zones: Eudora Email Client, Simple Mail Transfer Protocol (SMTP)
Tags: Internet access from remote location
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Solution Provided By: rickhobbs
Participating Experts: 1
Solution Grade: B
 
[+][-]11/20/08 05:43 PM, ID: 23009995Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

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