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Thunderbird not sending email with attached documents

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Thunderbird not sending email with attached documents - 3.Oct.2007 2:46:40 PM

carhbtt

Posts: 5
Joined: 1.Jul.2004
Status: offline

Hello.

I recently changed the modem box that gives me access to the internet, this box is the one connected to my external nic, evrything is working right (and was working right) but my thunderbird client is not allowing me to send mails which have documents attached, if I send the email with no attachments everything works fine.

I have not made any changes to isa configuration neither to thunderbird (everything was working fine until I changed the modem box). I have my web page hosted and also my mail is provided by them. We have made several tests (telnet, pings, tracert etc) and everything seems to point to something inside our network

The message I get is "This message could not be sent because connecting to SMTP server mail.qualitycleaningservices.com.mx failed. The server may be unavailable or is refusing SMTP connections. Please verify that your SMTP server settings is correct and try again."

I have a protocol rule that allows access to smtp and a scr that allows acces to my mail server provider. I am using firewall client on the pc running thunderbird.
The following is an extract of my firewall log when I try to send mail. ip 64.14.72.29 is my host provider.

Destination IP    Destination port    Processing time    Bytes sent    Bytes received    protocol name    Transport    Operation    Object name    Object MIME    Object source    result code    Cache info    Rule 1    Rule 2    Session ID    Connection ID
64.14.72.29    0    -    0    0    -    -    GHBN    -    -    -    0    0    SMTP pr    IMAP scr    24    0
64.14.72.29    143    -    0    0    143    TCP    Connect    -    -    -    0    0    IMAP pr    Internet Access    24    380
64.14.72.29    143    -    0    0    143    TCP    Connect    -    -    -    0    0    IMAP pr    Internet Access    24    380
63.245.209.10    0    313    0    0    -    -    GHBN    -    -    -    0    0    SMTP pr    Internet Access    24    0
63.245.209.10    80    375    0    0    80    TCP    Connect    -    -    -    0    0    PR acceso HTTP    Internet Access    24    381
63.245.209.10    80    375    0    0    80    TCP    Connect    -    -    -    0    0    PR acceso HTTP    Internet Access    24    381
63.245.209.10    80    -    0    0    80    TCP    Connect    -    -    -    0    0    PR acceso HTTP    Internet Access    24    382
63.245.209.10    80    -    0    0    80    TCP    Connect    -    -    -    0    0    PR acceso HTTP    Internet Access    24    382
64.14.72.29    143    3371000    996    10057    143    TCP    Connect    -    -    -    20000    0    IMAP pr    Internet Access    4    22
64.14.72.29    143    3258390    794    1900    143    TCP    Connect    -    -    -    20000    0    IMAP pr    Internet Access    4    136
64.14.72.29    25    -    0    0    25    TCP    Connect    -    -    -    0    0    SMTP pr    Internet Access    24    383
64.14.72.29    25    16    0    0    25    TCP    Connect    -    -    -    0    0    SMTP pr    Internet Access    24    383
63.245.209.10    80    72718    466    4203    80    TCP    Connect    -    -    -    20000    0    PR acceso HTTP    Internet Access    24    382

At the same time I sent the mail and it fail my os (w2000 server) shows me this on my log event "ISA Server detected an all port scan attack from Internet Protocol (IP) address 64.14.72.29. " which doest not make sense eince this is my web hosting provider and they assure me there is no such thing coming from them.

Can anyone point me to the right spot to find an answer?

Thank you.

Carlos Hernandez