حل مشكلة توقف الايميل عن الارسال لايميل معين مع عمل الاستقبال Solved 100%
all hosts have been failing for a long time (and retry time not reached)

Receiving but unable to send email
Bounced Message "retry time not reached for any host after a long failure period"
Emails being bounced back but only to one particular domain?

المشكلة :

الايميل يرسل لاى دومين بدون اى مشكلة عدا دومين واحد فقط
رغم استقباله للايميل الا انه لا يرسل حيث يسقط فى الحال ويفشل الارسال دون الخروج من السيرفر
ويحدث ارتداد ايميل بخطا بسبب خلل فى قاعدة بيانات exim/db
حيث يكون هناك لوك ا حظر يجب ازالته من خلال بعض الاوامر فى الشيل الخاص بالسيرفر.

Mail delivery failed: returning message to sender
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
all hosts for 'domain.com' have been failing for a long time (and retry time not reached)
Reporting-MTA: dns; server.abc.com
If you receive complaints from people sending mail to you with the following error"retry time not reached for any host after a long failure period", it is likely due to an error with the server sending mail at their end. The Exim Retry Database has likely become corrupt and would need to be fixed before they could retry sending mail to your email address/domain.

حل المشكلة:

ادخل على الشيل وادخل تلك الاوامر و سيتم حل المشكلة فى الحال
For reference, the procedure for fixing this (if you want to look knowledgeable to their systems administrator) is as follows:
If using cPanel with CentOS, as root user run the following:


كود:
cd /var/spool/exim/db
rm -f retry retry.lockfile
rm -f wait-remote_smtp wait-remote_smtp.lockfile
service exim restart
او استخدم تلك الاوامر

كود:
/usr/sbin/exim_tidydb -t 1d /var/spool/exim retry > /dev/null
/usr/sbin/exim_tidydb -t 1d /var/spool/exim reject > /dev/null
/usr/sbin/exim_tidydb -t 1d /var/spool/exim wait-remote_smtp > /dev/null
/scripts/courierup -- force
/scripts/eximup --force
تم التجربة من خلالنا و حل المشكلة يعمل بشكل سليم 100 %

المرجع:
http://www.createhosting.co.nz/support/knowledgebase.php?action=displayarticle&id=53
http://en.stealthsettings.com/fix-ex...e-reached.html