overleaf
SSL out of date
Steps to Reproduce
- Setup mailgun.com SMTP
- Send a test mail
Expected Behavior
mail sends successfully
Observed Behavior
Error below:
[2022-03-15 00:04:17] INFO: Sending mail using SMTP/2.0.1[client:2.0.1]
[2022-03-15 00:04:17] ERROR: [dTrCV8rSo8s] 140296029108096:error:1408F10B:SSL routines:ssl3_get_record:wrong version number:../deps/openssl/openssl/ssl/record/ssl3_record.c:332:
[2022-03-15 00:04:17] DEBUG: [dTrCV8rSo8s] Closing connection to the server using "destroy"
[2022-03-15 00:04:17] ERROR: Send Error: 140296029108096:error:1408F10B:SSL routines:ssl3_get_record:wrong version number:../deps/openssl/openssl/ssl/record/ssl3_record.c:332:
Context
Makes it difficult to setup the mail service
Analysis
It looks like the SSL is out of date and I'm assuming mailgun enforces a higher version of SSL than what overleaf supports.
Work Around
I setup a local postfix server that correctly connects and relays the SMTP and used SMTP unauthed in the container without SSL.
I then add to the docker compose:
extra_hosts:
- "host.docker.internal:host-gateway"
And variables look like:
[email protected]
SHARELATEX_EMAIL_SMTP_HOST=host.docker.internal
SHARELATEX_EMAIL_SMTP_PORT=25
SHARELATEX_EMAIL_SMTP_SECURE=false
SHARELATEX_EMAIL_SMTP_NAME=ubuntu
SHARELATEX_EMAIL_SMTP_LOGGER=true
SHARELATEX_EMAIL_SMTP_TLS_REJECT_UNAUTH=false
SHARELATEX_EMAIL_SMTP_IGNORE_TLS=true
From this answer on Stack Overflow, port for SSL is 465, not 587 which is for STARTTLS. Replacing SHARELATEX_EMAIL_SMTP_PORT=587 to SHARELATEX_EMAIL_SMTP_PORT=465 solves the problem.
I believe I tried both but it's been so long now I can't remember all the configuration details I tried. But mailgun supports 25, 587, and 465 and I believe I tried them all. Also the linked stacked overflow looks like a different error than ssl3_record.c:332