0xerr0r / mailcatcher Goto Github PK

Hi,

I was hoping to use something exactly like this, so it's great that this already exists. Thanks for writing it!

A few things I hit getting it writing which might be helpful to someone else (if they find this error or to add to the README?)

• I was using a little cloud VPS so it's not as easy to set up port forwarding like you mention, I was just going to use port 25 straight. After a lot of errors, it turns out you can't use 25:25 in the docker-compose.yml, you have to use quoted "25:25". Strange
• For using GMail SMTP, you also have to turn insecure apps on https://support.google.com/accounts/answer/6010255?hl=en . I thought there was a way to have a per-application password to make it more secure but didn't look more (I'll just use a throwaway account to forward). You also have to wait 30 minutes for it percolate
• When you convert incoming To: -> From: (here), I had issues if the To: email already includes a name. So if the incoming email has To: John <[email protected]> it is converted to From: John <[email protected]> <[email protected]> and GMail doesn't always appreciate two sets of brackets. I can give a PR, I don't know Golang well so I just regexp'd removed [<>] away.
• A GMail fact I've hit over and over and forget each time when debugging. Maybe it'll save someone else some trouble. Say [email protected] and [email protected]. If you send from [email protected] -> [email protected] it will silently stop before it sends a duplicate back to john again. Many SMTP providers including gmail use the Message-ID to prevent loops, so it'll just silently drop the email. Using mailinator/similar as MC_REDIRECT_TO is better for the initial debugging