SMTP connection failures

[Allslava]

Delta Chat fails to send via SMTP to Beget/Timeweb from Russian IPs, while Thunderbird works. ТСПУ blocks rustls TLS fingerprint, works only with Yandex/Mail.ru whitelist or with 'accept invalid certs'

LOG:

Some(\"[AUTHENTICATIONFAILED] Authentication failed.\")."
2026-06-07T08:42:04.502Z	core/event            	WARNING	""	1	"src/scheduler.rs:633: Failed to prepare Mvbox connection: Не удалось авторизоваться как \"poltavskiy@budu-buuzy.ru\". Убедитесь, что адрес электронной почты и пароль введены правильно. (no response: code: None, info: Some(\"[AUTHENTICATIONFAILED] Authentication failed.\"))."
2026-06-07T08:42:04.502Z	core/event            	INFO	""	1	"src/scheduler.rs:630: Preparing new IMAP session for Mvbox."
2026-06-07T08:42:04.502Z	core/event            	WARNING	""	1	"src/imap.rs:324: IMAP got rate limited, waiting for 0h 0m 58s until can connect."
2026-06-07T08:42:08.504Z	core/event            	WARNING	""	1	"src/imap.rs:447: IMAP failed to login: no response: code: None, info: Some(\"[AUTHENTICATIONFAILED] Authentication failed.\")."
2026-06-07T08:42:08.504Z	core/event            	WARNING	""	1	"src/scheduler.rs:378: Transport 1: Failed to prepare inbox connection: Не удалось авторизоваться как \"poltavskiy@budu-buuzy.ru\". Убедитесь, что адрес электронной почты и пароль введены правильно. (no response: code: None, info: Some(\"[AUTHENTICATIONFAILED] Authentication failed.\"))."
2026-06-07T08:42:08.504Z	core/event            	INFO	""	1	"src/scheduler.rs:372: Transport 1: Preparing new IMAP session for inbox."
2026-06-07T08:42:08.504Z	core/event            	WARNING	""	1	"src/imap.rs:324: IMAP got rate limited, waiting for 0h 0m 54s until can connect."
2026-06-07T08:42:13.223Z	core/event            	WARNING	""	1	"src/smtp.rs:148: SMTP failed to connect and authenticate: Failed to send EHLO command: io: timed out: timed out."
2026-06-07T08:42:13.224Z	core/event            	INFO	""	1	"src/smtp.rs:623: Temporary SMTP failure while sending an MDN for ec9d433d-5134-475b-abdd-3c94cba3bdae@localhost."
2026-06-07T08:42:13.224Z	core/event            	WARNING	""	1	"src/scheduler.rs:686: send_smtp_messages failed: Failed to send MDNs: Temporary error while sending an MDN."
2026-06-07T08:42:13.224Z	core/event            	INFO	""	1	"src/scheduler.rs:708: SMTP fake idle started."
2026-06-07T08:42:13.224Z	core/event            	INFO	""	1	"src/scheduler.rs:720: SMTP has messages to retry, planning to retry 60 seconds later."
2026-06-07T08:42:56.150Z	core/event            	WARNING	""	7	"Read error on stream 176.57.223.16:993 after reading 5392 and writing 422 bytes: timed out."
2026-06-07T08:42:56.150Z	core/event            	WARNING	""	7	"src/configure.rs:349: configure failed: Entered params: polt@bubuzy.ru imap:unset:***:imap.timeweb.ru:0:Automatic:AUTH_NORMAL smtp:unset:0:smtp.timeweb.ru:587:Starttls:AUTH_NORMAL cert_automatic. Used params: polt@bubuzy.ru imap:[imap.timeweb.ru:993:tls:polt@bubuzy.ru, imap.timeweb.ru:143:starttls:polt@bubuzy.ru] smtp:[smtp.timeweb.ru:587:starttls:polt@bubuzy.ru] provider:none cert_automatic. Error: CAPABILITY command error: io: timed out: timed out."
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/scheduler.rs:68: starting IO"
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/scheduler.rs:352: Starting inbox loop."
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/scheduler.rs:372: Transport 1: Preparing new IMAP session for inbox."
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/imap.rs:343: Connecting to IMAP server."
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/imap.rs:358: IMAP trying to connect to imap.timeweb.ru:993:tls."
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/net/dns.rs:134: Using memory-cached DNS resolution for imap.timeweb.ru."
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/net/dns.rs:180: Resolved imap.timeweb.ru into 176.57.223.17."
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/scheduler.rs:607: Starting simple loop for Mvbox."
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/scheduler.rs:630: Preparing new IMAP session for Mvbox."
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/imap.rs:343: Connecting to IMAP server."
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/scheduler.rs:668: Starting SMTP loop."
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/scheduler.rs:840: scheduler is running"
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/net/dns.rs:180: Resolved imap.timeweb.ru into 176.57.223.11."
2026-06-07T08:42:56.152Z	core/event            	INFO	""	7	"src/contact.rs:2159: Recently seen loop waiting for 24h 0m 0s or interrupt"
2026-06-07T08:42:56.541Z	renderer/loginForm    	ERROR	"\nfile:///app/delta/resources/app/src/components/dialogs/ConfigureProgressDialog.tsx:128:15"	"configure error"	{"code":-1,"message":"Ошибка конфигурации. Ошибка: CAPABILITY command error: io: timed out: timed out"}
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/location.rs:733: Location loop is waiting for 24h 0m 0s or interrupt"
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/imap.rs:358: IMAP trying to connect to imap.timeweb.ru:993:tls."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/net/dns.rs:134: Using memory-cached DNS resolution for imap.timeweb.ru."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/net/dns.rs:180: Resolved imap.timeweb.ru into 176.57.223.17."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/net/dns.rs:180: Resolved imap.timeweb.ru into 176.57.223.16."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/ephemeral.rs:612: Ephemeral loop waiting for deletion in 8089h 24m 44s or interrupt"
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/smtp.rs:522: Selected rows from SMTP queue: []."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/net/dns.rs:180: Resolved imap.timeweb.ru into 176.57.223.11."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/smtp.rs:639: Sending MDNs."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/net/dns.rs:180: Resolved imap.timeweb.ru into 176.57.223.16."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/imap/client.rs:122: Attempting IMAP connection to imap.timeweb.ru (176.57.223.16:993)."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/imap/client.rs:122: Attempting IMAP connection to imap.timeweb.ru (176.57.223.16:993)."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/smtp.rs:133: SMTP trying to connect to smtp.timeweb.ru:587:starttls."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/net/dns.rs:134: Using memory-cached DNS resolution for smtp.timeweb.ru."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/net/dns.rs:180: Resolved smtp.timeweb.ru into 176.57.223.7."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/net/dns.rs:180: Resolved smtp.timeweb.ru into 176.57.223.13."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/net/dns.rs:180: Resolved smtp.timeweb.ru into 176.57.223.12."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/smtp/connect.rs:108: Attempting SMTP connection to smtp.timeweb.ru (176.57.223.12:587)."
2026-06-07T08:42:56.550Z	core/event            	WARNING	""	7	"src/smtp.rs:148: SMTP failed to connect and authenticate: Failed to send EHLO command: io: timed out: timed out."
2026-06-07T08:42:56.550Z	core/event            	INFO	""	7	"src/imap.rs:396: Logging into IMAP server with LOGIN."
2026-06-07T08:42:56.551Z	core/event            	INFO	""	7	"src/imap.rs:396: Logging into IMAP server with LOGIN."
2026-06-07T08:42:56.551Z	core/event            	INFO	""	7	"src/smtp/connect.rs:108: Attempting SMTP connection to smtp.timeweb.ru (176.57.223.7:587)."
2026-06-07T08:43:02.740Z	core/event            	INFO	""	1	"src/imap.rs:343: Connecting to IMAP server."
2026-06-07T08:43:02.742Z	core/event            	INFO	""	1	"src/imap.rs:358: IMAP trying to connect to imap.beget.com:993:tls."
2026-06-07T08:43:02.742Z	core/event            	INFO	""	1	"src/net/dns.rs:134: Using memory-cached DNS resolution for imap.beget.com."
2026-06-07T08:43:02.742Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved imap.beget.com into 185.78.30.65."
2026-06-07T08:43:02.742Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved imap.beget.com into 185.78.30.117."
2026-06-07T08:43:02.742Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved imap.beget.com into 185.78.30.73."
2026-06-07T08:43:02.742Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved imap.beget.com into 185.78.30.41."
2026-06-07T08:43:02.742Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved imap.beget.com into 185.78.30.32."
2026-06-07T08:43:02.742Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved imap.beget.com into 185.78.30.52."
2026-06-07T08:43:02.742Z	core/event            	INFO	""	1	"src/imap/client.rs:122: Attempting IMAP connection to imap.beget.com (185.78.30.52:993)."
2026-06-07T08:43:02.758Z	core/event            	INFO	""	1	"src/imap.rs:343: Connecting to IMAP server."
2026-06-07T08:43:02.760Z	core/event            	INFO	""	1	"src/imap.rs:358: IMAP trying to connect to imap.beget.com:993:tls."
2026-06-07T08:43:02.760Z	core/event            	INFO	""	1	"src/net/dns.rs:134: Using memory-cached DNS resolution for imap.beget.com."
2026-06-07T08:43:02.760Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved imap.beget.com into 185.78.30.65."
2026-06-07T08:43:02.760Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved imap.beget.com into 185.78.30.117."
2026-06-07T08:43:02.760Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved imap.beget.com into 185.78.30.73."
2026-06-07T08:43:02.760Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved imap.beget.com into 185.78.30.41."
2026-06-07T08:43:02.760Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved imap.beget.com into 185.78.30.32."
2026-06-07T08:43:02.760Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved imap.beget.com into 185.78.30.52."
2026-06-07T08:43:02.760Z	core/event            	INFO	""	1	"src/imap/client.rs:122: Attempting IMAP connection to imap.beget.com (185.78.30.52:993)."
2026-06-07T08:43:02.942Z	core/event            	INFO	""	1	"src/imap.rs:396: Logging into IMAP server with LOGIN."
2026-06-07T08:43:02.968Z	core/event            	INFO	""	1	"src/imap.rs:396: Logging into IMAP server with LOGIN."
2026-06-07T08:43:04.048Z	core/event            	WARNING	""	1	"src/imap.rs:447: IMAP failed to login: no response: code: None, info: Some(\"[AUTHENTICATIONFAILED] Authentication failed.\")."
2026-06-07T08:43:04.048Z	core/event            	WARNING	""	1	"src/scheduler.rs:633: Failed to prepare Mvbox connection: Не удалось авторизоваться как \"poltavskiy@budu-buuzy.ru\". Убедитесь, что адрес электронной почты и пароль введены правильно. (no response: code: None, info: Some(\"[AUTHENTICATIONFAILED] Authentication failed.\"))."
2026-06-07T08:43:04.048Z	core/event            	INFO	""	1	"src/scheduler.rs:630: Preparing new IMAP session for Mvbox."
2026-06-07T08:43:04.048Z	core/event            	WARNING	""	1	"src/imap.rs:324: IMAP got rate limited, waiting for 0h 0m 58s until can connect."
2026-06-07T08:43:09.036Z	core/event            	WARNING	""	1	"src/imap.rs:447: IMAP failed to login: no response: code: None, info: Some(\"[AUTHENTICATIONFAILED] Authentication failed.\")."
2026-06-07T08:43:09.036Z	core/event            	WARNING	""	1	"src/scheduler.rs:378: Transport 1: Failed to prepare inbox connection: Не удалось авторизоваться как \"poltavskiy@budu-buuzy.ru\". Убедитесь, что адрес электронной почты и пароль введены правильно. (no response: code: None, info: Some(\"[AUTHENTICATIONFAILED] Authentication failed.\"))."
2026-06-07T08:43:09.036Z	core/event            	INFO	""	1	"src/scheduler.rs:372: Transport 1: Preparing new IMAP session for inbox."
2026-06-07T08:43:09.036Z	core/event            	WARNING	""	1	"src/imap.rs:324: IMAP got rate limited, waiting for 0h 0m 53s until can connect."
2026-06-07T08:43:13.225Z	core/event            	INFO	""	1	"src/scheduler.rs:740: SMTP fake idle interrupted."
2026-06-07T08:43:13.226Z	core/event            	INFO	""	1	"src/smtp.rs:522: Selected rows from SMTP queue: []."
2026-06-07T08:43:13.226Z	core/event            	INFO	""	1	"src/smtp.rs:639: Sending MDNs."
2026-06-07T08:43:13.227Z	core/event            	INFO	""	1	"src/smtp.rs:133: SMTP trying to connect to smtp.beget.com:465:tls."
2026-06-07T08:43:13.227Z	core/event            	INFO	""	1	"src/net/dns.rs:134: Using memory-cached DNS resolution for smtp.beget.com."
2026-06-07T08:43:13.227Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved smtp.beget.com into 185.78.30.80."
2026-06-07T08:43:13.227Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved smtp.beget.com into 185.78.30.58."
2026-06-07T08:43:13.227Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved smtp.beget.com into 5.101.158.98."
2026-06-07T08:43:13.227Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved smtp.beget.com into 185.78.30.27."
2026-06-07T08:43:13.227Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved smtp.beget.com into 5.101.158.97."
2026-06-07T08:43:13.227Z	core/event            	INFO	""	1	"src/net/dns.rs:180: Resolved smtp.beget.com into 185.78.30.103."
2026-06-07T08:43:13.227Z	core/event            	INFO	""	1	"src/smtp/connect.rs:108: Attempting SMTP connection to smtp.beget.com (5.101.158.97:465)."
2026-06-07T08:43:13.528Z	core/event            	INFO	""	1	"src/smtp/connect.rs:108: Attempting SMTP connection to smtp.beget.com (185.78.30.80:465)."

[konstantin-uvarov]

@chatmail, why have you deleted my comment?

[hpk42]

On Tue, Jun 09, 2026 at 11:48 -0700, Konstantin Uvarov wrote: konstantin-uvarov left a comment (chatmail/core#8314) @chatmail, why have you deleted my comment?

It looked LLM-generated, certainly too verbose while not adding much actionable info. In any case, if the problem persists with core 2.52 please open a bug and provide concise info. thanks.