Support for SMTP password auth methods other than PLAIN
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I have a mail and shell account with SDF.org and they recently (well, about 5 months ago) applied a change to their SMTP auth requirements. You now need to use the method that the macOS Mail app refers to as "MD5 Challenge-Response" or what Thunderbird refers to as "Encrypted password." I haven't been able to find much information on what that actually means but they no longer support PLAIN password authentication and I haven't been able to send mail from my SDF.org account in Vivaldi since before January 2024 due to this change.
Could we have those additional password methods implemented in Vivaldi's mail client so that it can be used with mail providers that don't support PLAIN authentication?
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@betazed It seems not too much clients actually support that and is somewhat deprecated.
So who knows why they switched. -
Reading the SDF Public Access UNIX System - Free Shell Account and Shell Access page do consider trying Connection Security set to StartTLS with Vivaldi's email client; this setting is also stated for Thunderbird
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@yojimbo274064400 thank you for bringing up their page. I've definitely been over that page and have selected the StartTLS option (interestingly, I can't select StartTLS for IMAP but that's off topic here).
When I have logging enabled in Vivaldi this is what I see when it attempts to send mail: "[outbox] Failed to send: AUTH mechanism PLAIN not available." (I attempted to include a screenshot inline and via link and the automated spam filter wouldn't let me post).
It looks like this is affecting other mail clients as well. I will be bringing it up to SDF as well especially based on @Hadden89's reply.
