![]() Hop=5 TTL 0 during transit from ip=50.97.17.78 name=02.Īs with the hping method, keep an eye out for any large times over 150.000 ms. Hop=4 TTL 0 during transit from ip=4.7.16.38 name=UNKNOWN Hop=2 TTL 0 during transit from ip=4.31.56.1 name=UNKNOWN Hop=1 TTL 0 during transit from ip=172.22.16.1 name=UNKNOWN How to run a traceroute: Open “terminal” and type “sudo hping -p 587 -S -T -c 10”.At each stop, details are given as to the address it travels to, and the amount of time to get there also in milliseconds. You are able to see every stop along the route that the packet travels from the customer’s network to SendGrid’s servers. A traceroute is along the same lines as a ping, you can think of a traceroute as a deeper analysis in the sense that it allows you to see at which “hop” the latency may begin to occur.Round-trip min/avg/max = 40.5/44.5/51.8 msĪnything exceeding 150.000 ms should be the first indication that something may be amiss regarding your network connection. hping statistic -Ĩ packets tramitted, 8 packets received, 0% packet loss Type “sudo hping -p 587 -S” and you will see a ping occur continually. In our troubleshooting scenario below, we'll run a hping command to our SMTP server at Ģ. You should always test hping to help determine response time and TTL (time to live) in milliseconds. (or Test-NetConnection as a Windows alternative). Below are a number of methods that will help you determine where a latency issue really is. There is always the possibility that network problem issue lies with either yours or your ISPs configuration. However, some latency issues are simply due to the quality of your connection or traffic shaping. More often that not, one of the 3 suggestions above will resolve a latency problem. None of those helped, what else can I try? We recommend using caution when incrementing your number of active connections. One thing to ensure is to make certain that the maximum amount of mail is passed before terminating each connection. However, please note that SendGrid can generally handle as much mail as you can throw at us. Lastly, you can try to open additional connections from your end: Generally, we recommend a maximum of 10 concurrent connections. You can use this option through SMTP sending as well as the Web API v3.ģ. As with SMTP, 5000 messages can be sent with each connection, but there can be 1000 TO: recipients for each message using the x-smtpapi header. You can use our SMTPAPI to greatly increase your message throughput. ![]() If you need help getting started with our libraries, check out the tutorials in each of the languages:Ģ. These are written with efficiency in mind. ![]() If you are integrated with SendGrid using code, we highly recommend using the official SendGrid libraries available on our GitHub account. Mail delays can manifest in a number of ways, so we've collected a list of tips to help you try to track them down! 1. ![]() As you send emails, you may encounter scenarios where mail seems to take more time than it should to get to its final destination. ![]()
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