Sendmail slow with attachments

[dlewis7444]

Sendmail takes a few seconds just to send a short email to myself. If I attach a 2 meg file, it takes almost 10 minutes.

When I receive the 2 meg email, it comes through in less than 10 seconds.

What could be causing sendmail to run so slow? I'm sure it's not a DNS issue because then every email would take a long time regardless of size. This is definitely size related.

I'm using Outlook on the client side. Dovecot is my pop3 server.

The server runs Fedora Core 6, sendmail is 8.14.1.

My config is below:
ivert(-1)dnl
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for linux')dnl
OSTYPE(`linux')dnl
define(`SMART_HOST',`myisp.com')
define(`confDEF_USER_ID', ``8:12'')dnl
define(`confTO_CONNECT', `1m')dnl
define(`confTRY_NULL_MX_LIST', `True')dnl
define(`confDONT_PROBE_INTERFACES', `True')dnl
define(`PROCMAIL_MAILER_PATH', `/usr/bin/procmail')dnl
define(`ALIAS_FILE', `/etc/aliases')dnl
define(`STATUS_FILE', `/var/log/mail/statistics')dnl
define(`UUCP_MAILER_MAX', `2000000')dnl
define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl
define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl
define(`confAUTH_OPTIONS', `A')dnl
define(`confTO_IDENT', `0')dnl
FEATURE(`no_default_msa', `dnl')dnl
FEATURE(`smrsh', `/usr/sbin/smrsh')dnl
FEATURE(`mailertable', `hash -o /etc/mail/mailertable.db')dnl
FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')dnl
FEATURE(redirect)dnl
FEATURE(always_add_domain)dnl
FEATURE(use_cw_file)dnl
FEATURE(use_ct_file)dnl
FEATURE(local_procmail, `', `procmail -t -Y -a $h -d $u')dnl
FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl
FEATURE(`blacklist_recipients')dnl
EXPOSED_USER(`root')dnl
LOCAL_DOMAIN(`localhost.localdomain')dnl
MASQUERADE_AS(`dwproducts.com')dnl
FEATURE(masquerade_envelope)dnl
FEATURE(masquerade_entire_domain)dnl
MAILER(smtp)dnl
MAILER(procmail)dnl
Cwmachinename.mydomain.com
Cwmail.mydomain.com

 

[dlewis7444]

As it turned out, it was a bad cable. It wasn't just Sendmail, anything sent to the server was slow - while anything received from the server ran at a reasonable speed.

Replaced the cable, works great now.