I am using Thunderbird with POP/SMTP and have recently been unable to send mail. The message from Thunderbird is: "Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp.zoho.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again." My settings are:
tracert smtp.zoho.com
Tracing route to smtp.zoho.com [204.141.42.56]
over a maximum of 30 hops:
4 32 ms 38 ms 44 ms 10.1.41.6
5 35 ms * * 10.1.41.5
6 47 ms 45 ms 37 ms 41.189.225.125
7 102 ms 107 ms 118 ms ae78.edge4.Marseille1.Level3.net [212.133.4.65]
8 256 ms 243 ms 249 ms ae6.3.bar1.SaltLakeCity1.level3.net [4.69.220.109]
9 285 ms 272 ms 265 ms ZOHO-CORPOR.bar1.SaltLakeCity1.Level3.net [4.14.145.106]
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.
Trace complete.
Thanks for any suggestions.