[sylpheed:32646] SMTP Trouble with Large Attachments

[Aric Gregson]

Hello,

I have multiple SMTP accounts that I use and one of them in particular
is causing me problems with enclosures larger than about 1.4MB (encoded
size). The send dialog stalls and then eventually quits saying the
session timed out. I am behind a firewall, but three other SMTP
servers give no complaint with similar sized attachments. 

I have spoken with the account support and they have changed nothing
recently. I can receive and send mail otherwise through this account. I
can send the same attachment, through the same account, via Thunderbird
and Evolution. 

This is all I get from the log:

* Connecting to SMTP server: mail.ucla.edu ...
[16:57:37] SMTP< 220 mail.ucla.edu ESMTP Sendmail 8.13.8/8.13.8; Wed, 1
Oct 2008 17:04:23 -0700 [16:57:37] ESMTP> EHLO solenv
[16:57:37] ESMTP< 250-mail.ucla.edu Hello [149.142.243.120], pleased to
meet you [16:57:37] ESMTP< 250-ENHANCEDSTATUSCODES
[16:57:37] ESMTP< 250-PIPELINING
[16:57:37] ESMTP< 250-8BITMIME
[16:57:37] ESMTP< 250-SIZE 20971520
[16:57:37] ESMTP< 250-DSN
[16:57:37] ESMTP< 250-ETRN
[16:57:37] ESMTP< 250-STARTTLS
[16:57:37] ESMTP< 250-DELIVERBY
[16:57:37] ESMTP< 250 HELP
[16:57:37] ESMTP> STARTTLS
[16:57:37] ESMTP< 220 2.0.0 Ready to start TLS
* SSL certificate of mail.ucla.edu previously accepted
[16:57:37] ESMTP> EHLO solenv
[16:57:37] ESMTP< 250-mail.ucla.edu Hello [149.142.243.120], pleased to
meet you [16:57:37] ESMTP< 250-ENHANCEDSTATUSCODES
[16:57:37] ESMTP< 250-PIPELINING
[16:57:37] ESMTP< 250-8BITMIME
[16:57:37] ESMTP< 250-SIZE 20971520
[16:57:37] ESMTP< 250-DSN
[16:57:37] ESMTP< 250-ETRN
[16:57:37] ESMTP< 250-AUTH PLAIN LOGIN
[16:57:37] ESMTP< 250-DELIVERBY
[16:57:37] ESMTP< 250 HELP
[16:57:37] ESMTP> AUTH PLAIN ********
[16:57:37] ESMTP< 235 2.0.0 OK Authenticated
[16:57:37] SMTP> MAIL FROM:<a.gregson at ucla.edu>
[16:57:37] SMTP< 250 2.1.0 <a.gregson at ucla.edu>... Sender ok
[16:57:37] SMTP> RCPT TO:<aorchid at mac.com>
[16:57:37] SMTP< 250 2.1.5 <aorchid at mac.com>... Recipient ok
[16:57:37] SMTP> DATA
[16:57:37] SMTP< 354 Enter mail, end with "." on a line by itself
** LibSylph-WARNING: session timeout.

** LibSylph-WARNING: [16:58:39] Session timed out.

** Session timed out.

Any suggestions are greatly appreciated. 

thanks, aric