Hi Derek,
This diagnostic error code indicates a known Thunderbird issue sending mail
when your time/date are wrong.
Setup ntpd for best results.
You also want to be sure you have perfectly acceptable PTR records for
Yahoo and Gmail to enhance deliverability (although this has nothing to do
with this problem):
http://www.webmasterworld.com/apache/4231275.htm
On Sat, Jul 7, 2012 at 9:03 PM, Derek Trotter <
expat.arizonan@gmail.com>wrote:
> I don't know who else to ask, but yesterday and today I've had trouble
> sending email to a friend who has a verizon.net address. Verizon keeps
> rejecting them. Here's what I get back from them. I just don't know who
> else to ask. Has anyone else had this trouble?
>
> thanks
>
> Message-id:<4FF90584.6030107@**gmail.com <4FF90584.6030107@gmail.com>>
> Date: Sat, 07 Jul 2012 20:59:00 -0700
> From: Derek<######@gmail.com>
> To: John<######@verizon.net>
> Subject: just checking
>
> Your message cannot be delivered to the following recipients:
>
> Recipient address: @relay.verizon.yahoo.com:#####**#@verizon.net
> Original address:######@verizon.net
> Reason: SMTP transmission failure has occurred
> Diagnostic code: smtp;554 Message not allowed - [320]
> Remote system: dns;mx1-vzn.mail.yahoo.com (TCP|206.46.172.79|34174|67.195.168.231|25)
> (mta1012.vzn.mail.ac4.yahoo.**com <http://mta1012.vzn.mail.ac4.yahoo.com>ESMTP YSmtp service ready)
>
>
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