[Building Sakai] mail sending failures - greylisting

[Steve Swinsburg]

Hi all,

I am getting the following errors when sending mail from within Sakai,  
either via Site Info > Add Participants, or via the Mailtool:
Failed to send email.
Error message: Sending failed; nested exception is: class  
javax.mail.SendFailedException: Invalid Addresses;
nested exception is: class javax.mail.SendFailedException: 451 4.7.1  
Greylisting in action, please come back in 00:10:00

I've never seen this before. the email addresses I am supplying are  
valid and varied (ie not all the same domain), but it returns this  
error so quickly that I think it's something to do with the mail setup  
on this end, not the receiving end.

Anyone know what the go is here?

cheers,
Steve

---
Steve Swinsburg
Portal Systems Developer
Centre for e-Science
Lancaster University
Lancaster
LA1 4YT

email: s.swinsburg at lancaster.ac.uk
phone: +44 (0) 1524 594870







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