Russell Leighton <[log in to unmask]> wrote on 03/11/2010 12:54:19
PM:


> I am getting this error for just this user on one of my lists.  When he
> tries to manually login to my listserv site he gets this error:
> "SonicWALL - Blocked by Application Firewall".  I think his firewall is
> blocking my listserv emails because he is the only account on that list
> that gets an error message back to me.

Someone's SonicWall firewall, possibly at the user's site, is blocking the
connection to your listserv server.  I would be that it is because the URL
contains ".EXE" and it thinks it may be a link to an executable malware
and bblocks it.

> This is what I receive from my listserv.
>
> Your message did not reach some or all of the intended recipients.
>
>       Subject:         Re: Modified Early Warning System
>       Sent:               3/11/2010 10:16 AM
>
> The following recipient(s) cannot be reached:
>
>       [log in to unmask] on 3/11/2010 11:49 AM
>             There was a SMTP communication problem with the recipient's
> email server.  Please contact your system administrator.
>             <mail.AARC.ORG #5.5.0 smtp;550 Invalid sender address
> (#5.7.1)>

Is this the same user??  The web access issue is probably separate from an
invalid address issue.  Can you send emails directly to this user?

> I am just trying to cover all my bases before I tell his IT department
> to look at their side.  Has anyone had this error that ended up being
> their fault.

Lots of luck on that one!




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