I installed a 2901 ISR with 3560 switch as my DHCP server. I have no issues receiving emails; but there is a delay of 33 seconds when sending emails. I spoke to my email provider and ISP they could not find any issue. As per wireshark, I could analyse that receiving is all good and when sending emails I do not get a reply from the SMTP server (hosted at the ISP) for about 33 seconds. I spoke to the TAC team & they could not find anything wrong with the config. I have tried sending emails from different site and that works without any delay.
Anyhelp would be appreciated as I am having this issue since last 3 days.
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