On Thu, 22 Apr 2010 15:38:06 -0600 The Doctor <doc...@doctor.nl2k.ab.ca> wrote:
> Out: 220 doctor.nl2k.ab.ca ESMTP Postfix (2.8-20100323) > In: XXXX mail-iw0-f172.google.com > Out: 402 4.5.2 Error: command not recognized XXXX is not a valid SMTP/ESMTP command. Are you using a Pix? > Out: 451 4.3.0 Error: queue file write error I believe that will show up in an SMTP (ie, not ESMTP) session where the SIZE attribute is neither specified nor read from the ESMTP response. Ie, "send a file larger than the max size and don't bother telling the receiver 'oh, yeah, here comes a 20M file' first." The ESMTP response (which would be seen if the XXXX was EHLO) tells the maximum message size, and ESMTP also allows for a SIZE= parameter on the MAIL FROM: as a sort of 'warning' to the receiver as well. Google -does- usually use ESMTP, so it really looks like you have a Pix running SMTP Fixup, which doesn't fix anything at all.
