On Fri, Jan 23, 2009 at 04:09:07PM -0500, sean darcy wrote:
> I have a voip server that receives faxes in a tif file. I use fax2email
> to convert the tif to a pdf and send it as an attachment over postfix.
> My isp blocks port 22, so I've setup a gmail account to use as a relay.
> That generally works.
>
> But, every once in a while, authentication fails. When I try to log in
> over the web, gmail requires not just userword and password, but also a
> CAPTCHA. That's obviously why postfix authentication won't work.
>
> I've unlocked the CAPTCHA, so the gmail account works now.
>
> Anybody know why the gmail account required the CAPTCHA? How can I keep
> it from happening again? The account is only used by postfix for this
> purpose. Is there some postfix magic I'm missing?
Using a stronger (as deemd by Gmail) password may help, but they probably
have abuse heuristics that trigger re-CAPTCHA of accounts that appear
compromised. Sending high volumes of mail via automation (non-personal
use) may fairly reliably trigger this. Gmail is not a submission service
for MTAs handling something other than mail composed (infrequently) by
humans.
--
Viktor.
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