I can't send mail via smtp.comcast.net. I can connect to IMAP and get mail, and I can send from my iphone and (new) Outlook.
Running TB v142.0 (64 bit) on Windows 11. Is… (read more)
I can't send mail via smtp.comcast.net. I can connect to IMAP and get mail, and I can send from my iphone and (new) Outlook.
Running TB v142.0 (64 bit) on Windows 11. Issue is reproducible on second system.
When I try to send mail, client tries for 1 minute, then times out with "Sending of the message failed.
The message could not be sent because the connection to Outgoing server (SMTP) smtp.comcast.net timed out. Try again."
TB log says:
14:17:11.775 1756750631775 addons.xpi WARN Checking C:\Program Files\Mozilla Thunderbird\distribution\extensions for addons
14:19:37.714 mailnews.smtp: New client instance SmtpClient.sys.mjs:121:17
14:19:37.716 mailnews.smtp: Connecting to smtp://smtp.comcast.net:587 SmtpClient.sys.mjs:141:19
14:19:37.799 mailnews.smtp: Connected SmtpClient.sys.mjs:429:17
14:20:39.211 mailnews.smtp: NetworkError: a Network error occurred SmtpClient.sys.mjs:476:17
_onError resource:///modules/SmtpClient.sys.mjs:476
14:20:39.212 mailnews.smtp: Socket closed. SmtpClient.sys.mjs:550:17
14:20:39.214 mailnews.smtp: SecurityError info: PR_END_OF_FILE_ERROR SmtpClient.sys.mjs:491:21
14:20:39.245 mailnews.send: Sending failed; The message could not be sent because the connection to Outgoing server (SMTP) smtp.comcast.net timed out. Try again., exitCode=2152398868, originalMsgURI=imap-message://mgiul%40comcast.net@imap.comcast.net/Drafts#57692 MessageSend.sys.mjs:343:32
smtp.comcast.net is using a self-signed cert. Is this the problem?
C:\Users\rchar>openssl s_client -starttls smtp -connect smtp.comcast.net:587
Connecting to 96.103.145.180
CONNECTED(000001F8)
depth=3 C=GB, ST=Greater Manchester, L=Salford, O=Comodo CA Limited, CN=AAA Certificate Services
verify error:num=19:self-signed certificate in certificate chain
verify return:1
depth=3 C=GB, ST=Greater Manchester, L=Salford, O=Comodo CA Limited, CN=AAA Certificate Services
verify return:1
depth=2 C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Certification Authority
verify return:1
depth=1 C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Organization Validation Secure Server CA
verify return:1
depth=0 C=US, ST=Pennsylvania, O=Comcast Corporation, CN=smtp.comcast.net
verify return:1
---
Certificate chain
0 s:C=US, ST=Pennsylvania, O=Comcast Corporation, CN=smtp.comcast.net
i:C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Organization Validation Secure Server CA
a:PKEY: RSA, 2048 (bit); sigalg: sha256WithRSAEncryption
v:NotBefore: Jan 6 00:00:00 2025 GMT; NotAfter: Jan 6 23:59:59 2026 GMT
1 s:C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Organization Validation Secure Server CA
i:C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Certification Authority
a:PKEY: RSA, 2048 (bit); sigalg: sha384WithRSAEncryption
v:NotBefore: Feb 12 00:00:00 2014 GMT; NotAfter: Feb 11 23:59:59 2029 GMT
2 s:C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Certification Authority
i:C=GB, ST=Greater Manchester, L=Salford, O=Comodo CA Limited, CN=AAA Certificate Services
a:PKEY: RSA, 4096 (bit); sigalg: sha384WithRSAEncryption
v:NotBefore: Jan 1 00:00:00 2004 GMT; NotAfter: Dec 31 23:59:59 2028 GMT
3 s:C=GB, ST=Greater Manchester, L=Salford, O=Comodo CA Limited, CN=AAA Certificate Services
i:C=GB, ST=Greater Manchester, L=Salford, O=Comodo CA Limited, CN=AAA Certificate Services
a:PKEY: RSA, 2048 (bit); sigalg: sha1WithRSAEncryption
v:NotBefore: Jan 1 00:00:00 2004 GMT; NotAfter: Dec 31 23:59:59 2028 GMT
---
Server certificate
BEGIN CERTIFICATE-----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END CERTIFICATE-----
subject=C=US, ST=Pennsylvania, O=Comcast Corporation, CN=smtp.comcast.net
issuer=C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Organization Validation Secure Server CA
---
No client certificate CA names sent
Peer signing digest: SHA256
Peer signature type: rsa_pss_rsae_sha256
Peer Temp Key: X25519, 253 bits
---
SSL handshake has read 6708 bytes and written 1662 bytes
Verification error: self-signed certificate in certificate chain
---
New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384
Protocol: TLSv1.3
Server public key is 2048 bit
This TLS version forbids renegotiation.
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 19 (self-signed certificate in certificate chain)
---
250 OK
---
Post-Handshake New Session Ticket arrived:
SSL-Session:
Protocol : TLSv1.3
Cipher : TLS_AES_256_GCM_SHA384
Session-ID: 27FBCE0D025BF752A9F038657257E923F1E5560B92BB78A47C5C9E0FFFDBEF7B
Session-ID-ctx:
Resumption PSK: FAFF92690FBEDF157D2856329FDABB033F2A0948C5A0F668E4B69C197EC6E52B8DE8A676EA4A78EAEEED7E90C4935DEC
PSK identity: None
PSK identity hint: None
SRP username: None
TLS session ticket lifetime hint: 300 (seconds)
TLS session ticket:
0000 - 97 cc 16 34 49 69 e3 c2-8f 6b ab cb e0 53 cb c1 ...4Ii...k...S..
0010 - e0 31 10 bf c8 94 c5 d1-59 2b 3e 84 f7 63 44 be .1......Y+>..cD.
0020 - 3e d6 69 b0 d4 10 7a 1a-4f 6a da 21 91 6b 34 f2 >.i...z.Oj.!.k4.
0030 - 1c 2c df cc 5f ee b5 ce-4c 71 49 b0 28 d6 7b 92 .,.._...LqI.(.{.
0040 - 9e 6a dd bb 93 ca 9e 44-80 1f df ec f7 e4 95 04 .j.....D........
0050 - 7c c1 6b 1d 86 59 7c 18-7d 98 41 0d 04 a1 f1 ae |.k..Y|.}.A.....
0060 - 7b 6d 68 ad 68 a6 b2 32-95 71 d3 89 09 ea 28 7c {mh.h..2.q....(|
0070 - ee 8f 67 1e ab e6 09 d7-5d c6 67 0d 0e 63 7b 24 ..g.....].g..c{$
0080 - 87 cc fb eb 8f a8 c6 67-60 d2 70 e6 58 93 06 d0 .......g`.p.X...
0090 - 1f ef 95 15 53 92 95 19-85 76 91 26 7c a1 9e 96 ....S....v.&|...
00a0 - 12 9d bd b2 a9 38 45 05-a5 28 14 65 4c ac c0 6d .....8E..(.eL..m
00b0 - c6 65 e7 b8 4b ff 0c dd-58 82 c9 c5 de 8d 64 ab .e..K...X.....d.
00c0 - f4 59 c5 5c bc bd c2 e9-34 2a d7 a7 99 21 97 60 .Y.\....4*...!.`
Start Time: 1756752732
Timeout : 7200 (sec)
Verify return code: 19 (self-signed certificate in certificate chain)
Extended master secret: no
Max Early Data: 0
---
read R BLOCK
---
Post-Handshake New Session Ticket arrived:
SSL-Session:
Protocol : TLSv1.3
Cipher : TLS_AES_256_GCM_SHA384
Session-ID: 13DA31F60D1C9A3207FFEA54D2CEC29BB0D44016068E3E79A18492F695B02E80
Session-ID-ctx:
Resumption PSK: 44D18B4AEB19CDEBA968E3BD867C3B0167C07C61DC3091072882660FC234D4B3B071B663546C5B4AC3E53A6A5C206A9B
PSK identity: None
PSK identity hint: None
SRP username: None
TLS session ticket lifetime hint: 300 (seconds)
TLS session ticket:
0000 - 97 cc 16 34 49 69 e3 c2-8f 6b ab cb e0 53 cb c1 ...4Ii...k...S..
0010 - 09 52 42 f9 c9 f7 bc 99-5a b5 73 e3 9b b8 1c 91 .RB.....Z.s.....
0020 - 16 f5 ea 33 20 29 e1 59-79 65 46 0a 4b ad b7 fe ...3 ).YyeF.K...
0030 - b4 aa b7 7b f8 57 36 10-71 09 19 c6 d2 64 c4 8a ...{.W6.q....d..
0040 - 47 f6 28 4b 62 9e be ca-d9 16 1a e7 df 7d 51 f7 G.(Kb........}Q.
0050 - f6 66 04 fe 37 cf 0c bb-4f d8 d3 1b d6 06 be d0 .f..7...O.......
0060 - 21 ee 9e 65 ac a3 18 80-31 b7 17 5b 23 d2 9d 4e !..e....1..[#..N
0070 - 57 f7 b0 66 01 5f cc c5-a1 a5 96 ee d2 d8 55 ed W..f._........U.
0080 - 5b 91 86 da 91 d5 3d 17-36 bd a5 97 58 ab fb ad [.....=.6...X...
0090 - eb eb 38 5e fd e3 7a 13-b9 f8 5c 14 f5 80 3a 72 ..8^..z...\...:r
00a0 - 52 66 d9 23 8c a3 50 5c-3c e5 fc cb 22 21 11 3f Rf.#..P\<..."!.?
00b0 - a6 71 87 67 8b 33 8e b0-0a 65 46 f6 df 7a f0 f3 .q.g.3...eF..z..
00c0 - 04 4e cf 22 ad 4d 45 69-53 9c 45 56 df 07 ae e3 .N.".MEiS.EV....
Start Time: 1756752732
Timeout : 7200 (sec)
Verify return code: 19 (self-signed certificate in certificate chain)
Extended master secret: no
Max Early Data: 0
---
read R BLOCK
closed
C:\Users\rchar>