i've Release 5.0.4_GA_2101.F7_20080321141302 installed and from some days (i do'n't know if is for this reason, but after i upgrade ClamAV), i've a strange problem:
1) i can SUCCESFULL deliver email "without attachments" from client (Outlook or Outlook Express).
2) i can NOT deliver email "with attachments" (110 Kb is sufficient) from client. No errors appears in client (only timeout after some minutes, with retries possibility).
The only that i can say is this:
1) if i check the maillog for a NOT ATTACHMENTS email, i can see this:
Jun 14 12:44:21 xxxx postfix/smtpd: D3B5980B87E: client=unknown[192.168.20.254], sasl_method=LOGIN, email@example.com
Jun 14 12:50:00 xxxx postfix/qmgr: D3B5980B87E: from=<firstname.lastname@example.org>, size=214563, nrcpt=1 (queue active)
2) if i check the maillog for an ATTACHMENTS email, i can see this:
Jun 14 12:51:23 xxxx postfix/smtpd: 5F4A380B8A8: client=unknown[192.168.20.254], sasl_method=LOGIN, email@example.com
only ... the e-mail was not queued.
Anyone have any idea?