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jm00rman

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Outgoing mail queue slowness

We have recently installed Exchange 2013. We have noticed that with one recipient domain (wis.edu), mail just parks in the outgoing mail queue for more than an hour, then it sends. This does not happen with other recipients. Is there anything I can do to tweak the transoport service to force these emails to send quicker?
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Simon Butler (Sembee)
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jm00rman

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I'm not seeing any erros in the queue viewer. However, I have found that a second domain  is also experiencing similar delays, oneumd.org .

I checked the MX records for both sites and the common thread is that google mail servers are involved on both sites:


Here's oneumd.org:
oneumd.org      MX preference = 30, mail exchanger = aspmx2.googlemail.com
oneumd.org      MX preference = 30, mail exchanger = aspmx5.googlemail.com
oneumd.org      MX preference = 20, mail exchanger = alt1.aspmx.l.google.com
oneumd.org      MX preference = 10, mail exchanger = aspmx.l.google.com
oneumd.org      MX preference = 30, mail exchanger = aspmx4.googlemail.com
oneumd.org      MX preference = 20, mail exchanger = alt2.aspmx.l.google.com
oneumd.org      MX preference = 30, mail exchanger = aspmx3.googlemail.com

aspmx2.googlemail.com   internet address = 173.194.67.27
aspmx2.googlemail.com   AAAA IPv6 address = 2a00:1450:400c:c05::1a
alt1.aspmx.l.google.com internet address = 173.194.67.26
aspmx.l.google.com      internet address = 173.194.74.27
aspmx.l.google.com      AAAA IPv6 address = 2607:f8b0:400d:c01::1a
aspmx4.googlemail.com   AAAA IPv6 address = 2a00:1450:4001:c02::1a
alt2.aspmx.l.google.com AAAA IPv6 address = 2a00:1450:4013:c00::1a
aspmx3.googlemail.com   internet address = 173.194.65.27
aspmx3.googlemail.com   AAAA IPv6 address = 2a00:1450:4013:c00::1b

here's wis.edu:

wis.edu MX preference = 5, mail exchanger = alt1.aspmx.l.google.com
wis.edu MX preference = 5, mail exchanger = alt2.aspmx.l.google.com
wis.edu MX preference = 10, mail exchanger = aspmx2.googlemail.com
wis.edu MX preference = 10, mail exchanger = aspmx3.googlemail.com
wis.edu MX preference = 30, mail exchanger = aspmx4.googlemail.com
wis.edu MX preference = 30, mail exchanger = aspmx5.googlemail.com
wis.edu MX preference = 30, mail exchanger = wis.edu.s9a1.psmtp.com
wis.edu MX preference = 2, mail exchanger = wis.edu.s9a2.psmtp.com
wis.edu MX preference = 3, mail exchanger = wis.edu.s9b1.psmtp.com
wis.edu MX preference = 4, mail exchanger = wis.edu.s9b2.psmtp.com
wis.edu MX preference = 1, mail exchanger = aspmx.l.google.com

alt1.aspmx.l.google.com internet address = 173.194.67.26
alt1.aspmx.l.google.com AAAA IPv6 address = 2a00:1450:400c:c05::1a
alt2.aspmx.l.google.com AAAA IPv6 address = 2a00:1450:4013:c00::1a
aspmx2.googlemail.com   internet address = 173.194.67.27
aspmx2.googlemail.com   AAAA IPv6 address = 2a00:1450:400c:c05::1a
aspmx3.googlemail.com   internet address = 173.194.65.27
aspmx3.googlemail.com   AAAA IPv6 address = 2a00:1450:4013:c00::1b
wis.edu.s9a2.psmtp.com  internet address = 74.125.148.11
It also looks like postini is also involved.
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It was really stupid. The old Cisco SMTP fixup curse. I updated the IOS configuration on the ASA with the following configuration:

no fixup protocol smtp 25

and the emails sailed out of the queue without hesitation. Thanks for your help anyway.