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我的vps最近开始遇到sendmail问题很慢。对于使用PHP使用邮件功能发送的电子邮件或使用mail命令从命令行发送的电子邮件，这也是一样的。我知道这可能是没有足够的信息，但这里是日志开始：Sendmail在Centos VPS上很慢
#Appears about 8 seconds after the mail command is run
Mar 29 11:09:12 vps-1006136-254 sendmail[23362]: r2TF9732023362: from=apache, size=203, class=0, nrcpts=1, msgid=<[email protected]
m>, [email protected]
#PHP mail command was run at 11:09:19
Mar 29 11:09:27 vps-1006136-254 sendmail[23366]: r2TF9CIU023366: from=<[email protected]>, size=470, class=0, nrcpts=1, msgid=<201303291509.r2TF9732023
[email protected]>, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Mar 29 11:09:27 vps-1006136-254 sendmail[23362]: r2TF9732023362: [email protected], ctladdr=apache (48/48), delay=00:00:20, xdelay=00:00:15, mailer=relay, pri=30203, rel
ay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (r2TF9CIU023366 Message accepted for delivery)
#email finally sends
Mar 29 11:09:57 vps-1006136-254 sendmail[23376]: STARTTLS=client, relay=smtp.vps.myhosting.com., field=cn_subject, status=failed to extract CN
Mar 29 11:09:57 vps-1006136-254 sendmail[23376]: STARTTLS=client, relay=smtp.vps.myhosting.com., field=cn_issuer, status=failed to extract CN
Mar 29 11:09:57 vps-1006136-254 sendmail[23376]: STARTTLS=client, relay=smtp.vps.myhosting.com., version=TLSv1/SSLv3, verify=FAIL, cipher=DHE-RSA-AES256-SHA, bits=256/256
Mar 29 11:09:58 vps-1006136-254 sendmail[23376]: r2TF9CIU023366: to=<[email protected]>, ctladdr=<[email protected]> (48/48), delay=00:00:31, xdel
ay=00:00:31, mailer=relay, pri=120470, relay=smtp.vps.myhosting.com. [168.144.1.236], dsn=2.0.0, stat=Sent (OK id=1ULawH-0002KK-BM)
我的问题是，它似乎是PHP的邮件功能好像回到true之前等待完整的30秒以上，它会导致一些我的联系表单看起来没有反应。有谁知道我能做些什么来加快速度，或者在哪里查看更多信息？