Sendmail delay 80 secs everytime--what's causing it?

I'm on an ubuntu virtual server. Sendmail works through php's mail() function but it takes 80 seconds to complete every time.

I've checked the mail.log and these are the entries:

Aug 5 14:52:36 ve sendmail[13818]: p75DpuVo013818: from=www-data, size=109, class=0, nrcpts=1, msgid=<201108051351.p75DpuVo013818@server.com>, relay=www-data@localhost

Aug 5 14:53:16 ve sm-mta[13826]: p75DqarZ013826: from=, size=345, class=0, nrcpts=1, msgid=<201108051351.p75DpuVo013818@server.com>, proto=ESMTP, daemon=MTA-v4, relay=localhost.localdomain [127.0.0.1]

Aug 5 14:53:16 ve sendmail[13818]: p75DpuVo013818: to=email-address, ctladdr=www-data (33/33), delay=00:01:20, xdelay=00:00:40, mailer=relay, pri=30109, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (p75DqarZ013826 Message accepted for delivery)

Aug 5 14:53:17 ve sm-mta[13837]: STARTTLS=client, relay=address., version=TLSv1/SSLv3, verify=FAIL, cipher=AES128-SHA, bits=128/128

Aug 5 14:53:17 ve sm-mta[13837]: p75DqarZ013826: to=, ctladdr= (33/33), delay=00:00:01, xdelay=00:00:0开发者_开发知识库1, mailer=esmtp, pri=120345, relay=server.com. [65.55.88.22], dsn=2.0.0, stat=Sent (<201108051351.p75DpuVo013818@server.com> [InternalId=17901549] Queued mail for delivery)

The delay is 00:01:20..can anyone help me understand why?

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Does your server have a fully-qualified domain name? Apparently Sendmail injects a delay when the sending host doesn't have a FQDN:

• first, in /etc/hostname, change your hostname from whatever to a FQDN like whatever.one-of-your-hosted-domain-names.com

• then, in /etc/hosts, add a host entry like:

  99.123.45.67 whatever.mysite.com

Reboot and try to send a mail to yourself again. Sendmail wil not delay at all.

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It seems that targt server probably have some spam protection.

It restricts you to send mail for example 40 seconds and accepts your email on second attempt.

That might be your "problem"