We are running a Domino Mail Server ver. 6.0 and actually have clients that are still running 4.6 version.
In any event, everything ran PERFECT until 2 nights ago.
I sent an email to a friend who told me she did not get it.
The next day that was all I kept hearing.
As it stands, we receive e-mail with no problem at all.
Our config. has "not changed at all" and the only thing that I "think" there may have been a huge amount of mail going out that day.
However, we rebuilt a new Mail.box and it is still unable to send.
NO Antivirus is installed.
We are using a SonicWall Firewall and everything is the same as before. That carries the antivirus software.