On Sat, Sep 27, 2003, Dann Daggett wrote: > > I still need to keep this short as long emails still a problem. > > Tried setting MTU to 1450, still hangs on emails over 800 bytes. > > Last lines in maillog is (DebugLevel 99): > > Sep 27 22:11:38 ns1 sm-mta[2513]: h8S5BKkL002513: <-- DATA > > Sep 27 22:11:38 ns1 sm-mta[2513]: h8S5BKkL002513: --- 354 Enter > mail, > > end with "." on a line by itself > > Only hangs when STARTTLS is used after AUTH LOGIN. > > Same hang in both Netscape 7.1 and MS Outlook. > > Seems like an OpenSSL issue?? > > Hmm, I set my eth0 MTU to 576 and the longer emails via SSL get > through now. > Of course, that doesn't mean it's not an openssl problem, but it's > sure looking unlikely, and more likely a sendmail-8.12.10 problem.
Very unlikely... > I'll post this all to the sendmail newsgroup as well. I'm not going to > be to thrilled to run my MTU as 576 however, but if I need to, perhaps > I can just set that on a virutal interface like eth0:1 and only slow > down email and not the rest of my net services. > > Does anyone have any idea as to why STARTTLS based email breaks on > MTU=1500 yet non STARTTLS email doesn't? sendmail calls SSL_read(), SSL_write() for I/O if TLS is active. Unless there are some settings that influence OpenSSLs network I/O behaviour and depend on the MTU, it is very unlikely that sendmail is at fault. You can use openssl s_server/s_client to transfer some larger data and see how it behaves. ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
