Squirrelmail 554 error


Hi, I’ve already contacted tech support, so far with no reply, but thought I’d post here too.

I’ve got a custom install of squirrelmail on a couple of sites and recently I’ve been unable to send email with it. We only get 554 invalid address errors.

Does anyone know what might be the problem?


I asked the same question in August but haven’t gotten any answers. I’ll let you know if I find anything out!



Hey, I actually got it answered. The problem was that I didn’t have the right type of authentication specified.

I had to edit the config.php file (it’s not an option in the perl script, apparently) and set $smtp_auth_mech to “login”.